Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
lang van » dang van, tang van, hoang van
van hieu » cao hieu
tu sach » thu sach, te sach, tu cach
cam tuc » cam xuc, cam tu, nam thuc
vai cua » dai cua, hai cua, lai cua
tuc van » thuc van, truc van, tuc va
hieu va » hieu qua
tu lang » cu lang, tu lanh, xu lang
su sach » so sach, vu sach
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) tu lang van hieu. ((hieu va) OR (lieu va)) cam tuc van hanh vai cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) tu lang van hieu. ((hieu va) or (lieu va)) cam tuc van hanh vai cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) tu lang van hieu. ((hieu va) or (lieu va)) cam tuc van hanh vai cua tu*.