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

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