Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
dang xay » dang van, van xay
viec cac » vien cac, viec cua, viec lam
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
sang ky » sang kyo, dang ky, tang ky
lang xa » lang ha, lang van
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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: vu ((sang ky) OR (van ky)) ((lang xa) OR (dang xay)) hoi. hieu viec cac nuoc va hanh vi cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sang ky) or (van ky)) ((lang xa) OR (dang xay)) hoi. hieu viec cac nuoc va hanh vi cua tu~".
• Adding a wildcard symbol may retrieve word variants: vu ((sang ky) or (van ky)) ((lang xa) OR (dang xay)) hoi. hieu viec cac nuoc va hanh vi cua tu*.