Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach ty
cam lo » nam lo, cam ly, cam o
lam lo » nam lo, lam co, lam so

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