Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cam hoc » cao hoc, am hoc, cam hoa
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
ve cai » va cai, ve cac, ve tai
te san » te ban, tu san, ta san
ke san » ke dan
va cam » va cham, va cac, va cao
ve ca » ve cac, ve cau, ve cua

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: ((te san) OR (ke san)) ky tang xa hoi. hieu va cam hoc va thanh ((ve ca) OR (ve cai)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te san) or (ke san)) ky tang xa hoi. hieu va cam hoc va thanh ((ve ca) OR (ve cai)) tren~".
• Adding a wildcard symbol may retrieve word variants: ((te san) or (ke san)) ky tang xa hoi. hieu va cam hoc va thanh ((ve ca) OR (ve cai)) tren*.