Perhaps you should try some spelling variations:
kmay nang » ky nang, kha nang, may nong
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
may nang » may nong, ky nang, cam nang
cam tuc » cam xuc, cam tu, nam thuc
dan vai » dan va, dan vat, den vai
dan tai » van tai, dan thi, han tai
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((may nang) or (kmay nang)) xa hoi. hieu van cam tuc va ((dan vai) or (dan tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((may nang) OR (kmay nang)) xa hoi. hieu van cam tuc va ((dan vai) OR (dan tai)) va triet.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((may nang) or (kmay nang)) xa hoi. hieu van cam tuc va ((dan vai) or (dan tai)) va triet*.