Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
doc sach » hoc sach, toc sach, nuoc sach
chat xuc » chat huu, chao xu, chat cua
hieu va » lieu va, hieu qua
sach va » sach xa, sach ha, sach dao
cao hoi » cau hoi, co hoi, cao hoc
va nang » van nang, da nang, cam nang
lap su » lap du, lap tu, lap so

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

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