Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
cham lao » chai lao, cham lai, cham vao
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
lao van » dao van, cao van, lo van
cua tre » cua te, cuu tre, cua triet
sach ty » sach tu, sach thu, xach tay
hieu vu » hieu va, hieu su, dieu vu
cao hoi » cau hoi, co hoi, cao hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ty) or (sach y)) nang cao hoi. ((hieu vu) or (hieu ve)) cham lao van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ty) OR (sach y)) nang cao hoi. ((hieu vu) OR (hieu ve)) cham lao van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ty) or (sach y)) nang cao hoi. ((hieu vu) or (hieu ve)) cham lao van hanh vai cua tre*.