Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
va triet » va thiet, va trien, ve triet
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
dan vai » dan va, dan tai, dan vat
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
vai va » mai va, dai va, hai va

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 y ((nang xa) OR (nang x)) hoi. hieu ve cam tuc va dan vai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y ((nang xa) OR (nang x)) hoi. hieu ve cam tuc va dan vai va triet".
• Adding a wildcard symbol may retrieve word variants: hoc sach y ((nang xa) OR (nang x)) hoi. hieu ve cam tuc va dan vai va triet*.