Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » hieu ve, sieu viet, hieu hien
cac tac » cac toc, cac bac, cac dac
nha cua » nhat cua, nhan cua, nghia cua
xa lang » va lang, ba lang, ha lang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
tac xa » tuc xa, tac da
ha cua » hoa cua, hai cua, ham cua

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) or (nhieu viec)) cac tac xa lang ((ha cua) OR (nha cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ma hoa. ((hieu viec) OR (nhieu viec)) cac tac xa lang ((ha cua) OR (nha cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ma hoa. ((hieu viec) or (nhieu viec)) cac tac xa lang ((ha cua) OR (nha cua)) tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ma hoa. ((hieu viec) or (nhieu viec)) cac tac xa lang ((ha cua) OR (nha cua)) tu*.