Perhaps you should try some spelling variations:
ban thanh » ban hang
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
van hac » van hoc, van ha, van hai
hac xuc » chat xuc
lam cua » nam cua, lam chat
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach v nang x hoi. hieu van hac xuc ((ban thanh) OR (ban hanh)) ((lam cua) or (cao chat)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu van hac xuc ((ban thanh) OR (ban hanh)) ((lam cua) OR (cao chat)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu van hac xuc ((ban thanh) OR (ban hanh)) ((lam cua) or (cao chat)) triet".
• Adding a wildcard symbol may retrieve word variants: tu sach v nang x hoi. hieu van hac xuc ((ban thanh) OR (ban hanh)) ((lam cua) or (cao chat)) triet*.