Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
tu sach » thu sach, su sach, te sach
nang co » nang cao, nang doc, nang noi
co hoat » cao hoat, cac hoat, che hoat
hieu ve » hieu va, hieu van
va hang » van hang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
lam tu » nam tu, cam tu, dam tu
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 co hoat. ((hieu viec) or (hieu ve)) lam tu va hang va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang co hoat. ((hieu viec) OR (hieu ve)) lam tu va hang va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang co hoat. ((hieu viec) or (hieu ve)) lam tu va hang va cua tre*.