Perhaps you should try some spelling variations:
trinh kham » trinh cham, trinh khai, trinh han
trinh nhan » trinh han, trinh phan, trinh nha
trinh khau » trinh khai, trinh khac, trinh han
thai viet » thi viet, tai viet, mai viet
nhan dang » nhan dan, phan dang, tran dang
hoi viet » cuoi viet, gioi viet, thi viet
hai viet » mai viet, tai viet, dai viet
dang van » hoang van, hang va
cao quan » co quan, cao xuan, tac quan
bao quan » ban quan, van quan, tac quan
cac mau » cam mau, sach mau
oi viet » o viet, cuoi viet, gioi viet
cac cay » ca cay, cac cam, cac cap
van cac » van hac, van cau, van bac
cac cau » bac cau, ca cau, cac cam
co dan » co ban, ca dan, cao dang
cay co » cac co, tay co, cay cong
ca cac » cua cac, va cac
co dat » coc dat, co dot, co dai
van ca » van cau, van cua, dan ca

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( cong trinh ((cao quan) or (bao quan)) va ((cac cau) or (cac mau)) co ((hai viet) OR (thai viet)) nam ) or ((( cong ((trinh khau) or (trinh kham)) luan van ca cac ((co dat) or (co dan)) viet nam ) or ( cong trinh nhan dang van cac cay co ((oi viet) or (hoi viet)) nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh ((cao quan) OR (bao quan)) va ((cac cau) OR (cac mau)) co ((hai viet) OR (thai viet)) nam ) OR ((( cong ((trinh khau) OR (trinh kham)) luan van ca cac ((co dat) OR (co dan)) viet nam ) OR ( cong trinh nhan dang van cac cay co ((oi viet) OR (hoi viet)) nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong trinh ((cao quan) or (bao quan)) va ((cac cau) or (cac mau)) co ((hai viet) OR (thai viet)) nam ) or ((( cong ((trinh khau) or (trinh kham)) luan van ca cac ((co dat) or (co dan)) viet nam ) or ( cong trinh nhan dang van cac cay co ((oi viet) or (hoi viet)) nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( cong trinh ((cao quan) or (bao quan)) va ((cac cau) or (cac mau)) co ((hai viet) OR (thai viet)) nam ) or ((( cong ((trinh khau) or (trinh kham)) luan van ca cac ((co dat) or (co dan)) viet nam ) or ( cong trinh nhan dang van cac cay co ((oi viet) or (hoi viet)) nam ))))*.