Perhaps you should try some spelling variations:
ky trang » ke trang, ky trong, ky tang
trang xa » trang va, trang ha, trong xa
hieu va » lieu va, hieu qua
ke cau » ket cau
ve cau » va cau, ve cac, le cau
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
loc va » luc va
va cam » va cham, va cac, va cao

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