Perhaps you should try some spelling variations:
chuong trinh » cong trinh
thai viet » thi viet, tai viet, mai viet
hoi viet » hai viet, oi viet, cuoi viet
cao tang » cao dang
cao lan » cao dang, cao bang, cao nang
cao van » cac van, dao van, cao dang
cau lan » cau lanh, sau lan, cau van
cac cay » cac cam, cac cap, cac cau
ca cao » ca dao, cu cao, ca cac
ca cay » cua cay, ca cac, va cay

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

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