Perhaps you should try some spelling variations:
co viet » so viet, o viet, hoc viet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hang di » hang doi, hang vi, hang dien
xuc van » duc van, luc van, xuc ban
hanh di » hanh vi, hanh de, danh di
vuc van » duc van, luc van, thuc van
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
qua ca » qua cac, qua cua, qua cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky lang xa hoi. hieu qua ca ((xuc van) or (vuc van)) ((hanh di) or (hang di)) co viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky lang xa hoi. hieu qua ca ((xuc van) OR (vuc van)) ((hanh di) OR (hang di)) co viet.
• Adding a wildcard symbol may retrieve word variants: tu san ky lang xa hoi. hieu qua ca ((xuc van) or (vuc van)) ((hanh di) or (hang di)) co viet*.