Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lieu van » lieu va, hieu van, sieu van
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
nam tuc » nam thuc, nam truc, nam tu
tinh do » trinh do, tinh doi, kinh do
tinh da » tinh va, tinh gia, tinh lao
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 ky nang xa hoi. lieu van nam tuc va ((tinh do) or (tinh da)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang xa hoi. lieu van nam tuc va ((tinh do) OR (tinh da)) va triet.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. lieu van nam tuc va ((tinh do) or (tinh da)) va triet*.