Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
va nang » van nang, da nang, cam nang
hieu ve » hieu van
truc va » thuc va, thuc vat, trung va
cua te » cua tu
v nang » vu nang, van nang, voi nang

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) OR (va nang)) xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((v nang) OR (va nang)) xa hoi. ((hieu ve) OR (hieu va)) cau truc va hanh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((v nang) OR (va nang)) xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((v nang) OR (va nang)) xa hoi. ((hieu ve) or (hieu va)) cau truc va hanh lai cua te*.