Perhaps you should try some spelling variations:
thien tinh » khien tinh, thien minh, tien tinh
thanh chau » thanh cha, thanh cham, thanh chu
hoc thien » hoc hien, hoc thieu, hoc thiet
va duong » van duong, va tuong, va huong
cong van » cong vang, cong san, song van
phan cau » phan dau, phan cac, phan tu
va dung » van dung, vat dung, va ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien tinh - canh tranh ((va dung) OR (va duong)) cong van ((thanh chau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien tinh - canh tranh ((va dung) OR (va duong)) cong van ((thanh chau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien tinh - canh tranh ((va dung) OR (va duong)) cong van ((thanh chau) or (phan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc thien tinh - canh tranh ((va dung) OR (va duong)) cong van ((thanh chau) or (phan cau))*.