Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, va tinh, le thanh
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
cac tu » cac thu, cach tu, cac du

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. ((hieu ve) OR (hieu va)) cac tu ((va thanh) or (ban thanh)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. ((hieu ve) OR (hieu va)) cac tu ((va thanh) OR (ban thanh)) vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. ((hieu ve) OR (hieu va)) cac tu ((va thanh) or (ban thanh)) vai cua triet*".