Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
hieu va » lieu va, hieu qua
cam hoc » cao hoc, am hoc, cam hoa
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
te san » te ban, tu san, ta san
ke san » ke dan
va cam » va cham, va cac, va cao
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te san) or (ke san)) ky tang xa hoi. hieu va cam hoc va hanh ve cau tren~.
• 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 hanh ve cau tren.
• Adding a wildcard symbol may retrieve word variants: ((te san) or (ke san)) ky tang xa hoi. hieu va cam hoc va hanh ve cau tren*.