Perhaps you should try some spelling variations:
chuong trinh » cong trinh
khuong tinh » phuong trinh, phuong binh, khun tinh
trinh cac » trinh chat, trinh chao, trinh cham
trinh cau » trinh chat, trinh chao, trinh tu
chat deo » chat co
chat cua » nhat cua, chat va, chat huu
soi viet » so viet, oi viet, doi viet
loi viet » loai viet, oi viet, doi viet
hoi viet » hai viet, oi viet, thai viet
tran van » luan van
cap cot » cac cot
tan van » tang van, luan van, dang van
cac van » cac dan
cot soi » cot loi, cong soi
cao cap » cao chat
van cao » van dao, van bao, van hao
cac cay » ca cay, cac cam, cac cap
cau lan » cau lanh, cao lan, sau lan
lan van » luan van, lang van, san van
co hoi » co hoc, co loi
van va » van vat, van van, ban va
va cao » va cac, va co, va dao
cay co » cac co, tay co, cay cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( khuong tinh chat ((tan van) OR (tran van)) cac cay co hoi viet nam ) or ((( chuong trinh cau lan van cao cap cot soi viet nam ) or ( chuong trinh cac van va cao ((chat cua) or (chat deo)) loi viet nam ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( khuong tinh chat ((tan van) OR (tran van)) cac cay co hoi viet nam ) OR ((( chuong trinh cau lan van cao cap cot soi viet nam ) OR ( chuong trinh cac van va cao ((chat cua) OR (chat deo)) loi viet nam )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( khuong tinh chat ((tan van) OR (tran van)) cac cay co hoi viet nam ) or ((( chuong trinh cau lan van cao cap cot soi viet nam ) or ( chuong trinh cac van va cao ((chat cua) or (chat deo)) loi viet nam ))))".
• Adding a wildcard symbol may retrieve word variants: (( khuong tinh chat ((tan van) OR (tran van)) cac cay co hoi viet nam ) or ((( chuong trinh cau lan van cao cap cot soi viet nam ) or ( chuong trinh cac van va cao ((chat cua) or (chat deo)) loi viet nam ))))*.