Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
xa dong » ha dong, van dong, lao dong
xa nong » xuat nong, may nong, cua nong
cac tac » cac toc, cac bac, cac dac
sach ky » sach y, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
ca viet » va viet, co viet, hoa viet
sac ky » cac ky, sai ky
doi ca » doi cua, doi cay, duoi ca

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) lang xa hoi. hieu viec cac tac ((xa nong) OR (xa dong)) doi ca viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) lang xa hoi. hieu viec cac tac ((xa nong) or (xa dong)) doi ca viet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) lang xa hoi. hieu viec cac tac ((xa nong) or (xa dong)) doi ca viet*.