Perhaps you should try some spelling variations:
chuong trinh » cong trinh
trinh chao » trinh chat, trinh han, trinh co
trinh cau » trinh chat, trinh tu, trinh han
trinh cao » trinh co, tinh cao, trinh cho
soi viet » so viet, hoi viet, oi viet
cac tai » cao tai, cac bai, cac dai
lanh va » hanh va, anh va, lanh dao
cac tac » cac toc, cac bac, cac dac
cac tay » cac cay, cac tap, cam tay
cau lan » cau lanh, cao lan, sau lan
lan va » luan va, lan van, lang va
co soi » cot soi, co so, co hoi
nam co » nam cao, nam bo, nam so
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 ((trinh cao) OR (trinh chao)) lanh va cac ((cam co) or (nam co)) soi viet nam ) or ( chuong trinh cau lan va ((((cac tay) or (cac tac))) or (cac tai)) co soi viet nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( chuong ((trinh cao) OR (trinh chao)) lanh va cac ((cam co) OR (nam co)) soi viet nam ) OR ( chuong trinh cau lan va ((((cac tay) OR (cac tac))) OR (cac tai)) co soi viet nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( chuong ((trinh cao) OR (trinh chao)) lanh va cac ((cam co) or (nam co)) soi viet nam ) or ( chuong trinh cau lan va ((((cac tay) or (cac tac))) or (cac tai)) co soi viet nam ))".
• Adding a wildcard symbol may retrieve word variants: (( chuong ((trinh cao) OR (trinh chao)) lanh va cac ((cam co) or (nam co)) soi viet nam ) or ( chuong trinh cau lan va ((((cac tay) or (cac tac))) or (cac tai)) co soi viet nam ))*.