Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
cac tuc » cac toc, cac tu, cac tac
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang
vi cua » vai cua, di cua
cua te » cua tu

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 ma hoa. hieu viec cac tuc ((va hang) OR (va lang)) vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoa. hieu viec cac tuc ((va hang) OR (va lang)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. hieu viec cac tuc ((va hang) OR (va lang)) vi cua te*.