Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach thu » sach thue, sach thieu, sach tham
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, xach tay
cac tuc » cac toc, cac tu, cac tac
dan vai » dan va, dan vat, den vai
dan tai » van tai, dan thi, han tai
ve cac » va cac, vien cac

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 ty) or (sach thu)) nang xa hoi. hieu ve cac tuc xa ((dan vai) or (dan tai)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ty) OR (sach thu)) nang xa hoi. hieu ve cac tuc xa ((dan vai) OR (dan tai)) va triet.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ty) or (sach thu)) nang xa hoi. hieu ve cac tuc xa ((dan vai) or (dan tai)) va triet*.