Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » hieu hien, thieu nien, hieu tieng
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cac dac » cac dan, cac dai, cac bac
sang ky » sang kyo, dang ky, tang ky
so sang » so sanh, so dang, so lang
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cau tren, cau treo
dac va » duc va, day va, dat va

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: so sang ky lang xa hoi. ((hieu vien) OR (hieu viec)) cac dac va hanh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sang ky lang xa hoi. ((hieu vien) OR (hieu viec)) cac dac va hanh vi ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: so sang ky lang xa hoi. ((hieu vien) OR (hieu viec)) cac dac va hanh vi ((cua tre) or (cuu tre))*.