Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
hanh va » hang va, hanh vi
sach ky » sac ky, sach y, sach ty
viec va » vien va, viec cua, viec lam
cua tre » cua te, cua triet, dua tren
nang xa » lang xa, nang ma, mang xa
lo van » le van, vo van, so van
va lo » va loi, va lao, va co

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 va lo van hanh va ((cuu tre) or (cua 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 va lo van hanh va ((cuu tre) OR (cua 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 va lo van hanh va ((cuu tre) or (cua tre))*".