Perhaps you should try some spelling variations:
chuong trinh » cong trinh
chuong tinh » khuong tinh, thuong tinh, phuong trinh
trinh cau » trinh chat, trinh chao, trinh tu
soi viet » so viet, hoi viet, oi viet
cau lanh » cau danh, cay lanh, dau lanh
tinh cao » tinh lao, tinh chat, tinh cach
cao lanh » cao lan, cao anh, cao danh
lanh va » hanh va, anh va, lanh dao
cac tap » cac cap
cac tac » cac toc, cac bac, cac dac
cac tai » cao tai, cac bai, cac dai
nam co » nam cao, nam bo, nam so
co soi » cot soi, co so, co hoi
cam co » cac co, cay co, lam co

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( chuong tinh cao lanh va cac ((cam co) or (nam co)) soi viet nam ) or ( chuong trinh cau lanh va ((((cac tap) or (cac tac))) or (cac tai)) co soi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong tinh cao lanh va cac ((cam co) OR (nam co)) soi viet nam ) OR ( chuong trinh cau lanh va ((((cac tap) OR (cac tac))) OR (cac tai)) co soi viet nam )).
• Adding a wildcard symbol may retrieve word variants: (( chuong tinh cao lanh va cac ((cam co) or (nam co)) soi viet nam ) or ( chuong trinh cau lanh va ((((cac tap) or (cac tac))) or (cac tai)) co soi viet nam ))*.