Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hanh vai » hanh vi, hanh tai, hanh van
viec lam » viec va
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
lo van » vo van, so van, do van

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 ty nang xa hoi. hieu viec lam ((lo van) or (le van)) ((hanh vai) OR (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu viec lam ((lo van) OR (le van)) ((hanh vai) OR (hanh va)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu viec lam ((lo van) or (le van)) ((hanh vai) OR (hanh va)) cuu tre*".