Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
nang cac » nang cao, bang cac, hang cac
cac hoat » cao hoat, cac khoan, cac thuat
viec cac » vien cac, viec cua, viec lam
tu sach » thu sach, su sach, te sach
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
cac tu » cac thu, cach tu, cac du
va cua » va chua, via cua, ca cua

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 y nang cac hoat. hieu viec cac tu ((va hang) or (va lang)) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cac hoat. hieu viec cac tu ((va hang) OR (va lang)) va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cac hoat. hieu viec cac tu ((va hang) or (va lang)) va cua tre*.