Perhaps you should try some spelling variations:
trinh pham » trinh phan, trinh phap, trinh cham
trinh cao » trinh chao, trinh co, trinh cau
nhan dang » phan dang, tran dang
pham luan » phap luan, pham quang, pham van
cuoi viet » nguoi viet, co viet, nuoc viet
cao luan » cao lan, cao quan, cao xuan
hai viet » thai viet, mai viet, tai viet
nhan dan » phan dau, gian dan, nhan tai
dat viet » dao viet, da viet, dai viet
luan va » luan van, luat va
cac mau » cam mau, sach mau
co cuoi » co nuoi, cho cuoc, co nguoi
cac cac » cac cach, cac bac, cac cam
van cac » van hac, van cau, van bac
cac cau » bac cau, cac cam, cac cap
ca cau » can cau, cua cau, co cau
co dat » coc dat, co dan, co dot
cac co » cac cong
ca cac » cua cac, va cac
co hai » co dai, co hoi, o hai
va ca » va cac, va cao, va cai

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 luan va ((((cac cau) or (ca cau))) or (cac mau)) co hai viet nam ) or ((( cong trinh pham luan va ca cac co dat viet nam ) or ( cong trinh ((nhan dang) OR (nhan dan)) van cac cac co cuoi viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh cao luan va ((((cac cau) OR (ca cau))) OR (cac mau)) co hai viet nam ) OR ((( cong trinh pham luan va ca cac co dat viet nam ) OR ( cong trinh ((nhan dang) OR (nhan dan)) van cac cac co cuoi viet nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cong trinh cao luan va ((((cac cau) or (ca cau))) or (cac mau)) co hai viet nam ) or ((( cong trinh pham luan va ca cac co dat viet nam ) or ( cong trinh ((nhan dang) OR (nhan dan)) van cac cac co cuoi viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( cong trinh cao luan va ((((cac cau) or (ca cau))) or (cac mau)) co hai viet nam ) or ((( cong trinh pham luan va ca cac co dat viet nam ) or ( cong trinh ((nhan dang) OR (nhan dan)) van cac cac co cuoi viet nam ))))*.