Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
dua ban » dia ban, cua ban, qua ban
vai cua » dai cua, hai cua, lai cua
ma hoi » mai hoi, xa hoi, me hoi

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 ky nang ((ma hoi) or (ma hoa)). ((hieu van) or (hieu va)) chay dua ban thanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (ma hoa)). ((hieu van) OR (hieu va)) chay dua ban thanh vai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (ma hoa)). ((hieu van) or (hieu va)) chay dua ban thanh vai cua triet*.