Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thanh ve » thanh va, thanh vien, thanh van
hanh ve » hanh vi, hanh va, hanh kem
cam luc » cam xuc, cau luc
tang xa » trang xa, tang ma, lang xa
hieu va » hieu qua
ky tang » ky nang, ky dang, kho tang
san ky » sang ky, van ky, dan ky
luc va » duc va, tuc va, loc va
te san » te ban, ke san, tu san

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 ky tang xa hoi. ((hieu va) OR (lieu va)) cam luc va ((thanh ve) or (hanh ve)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky tang xa hoi. ((hieu va) OR (lieu va)) cam luc va ((thanh ve) OR (hanh ve)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky tang xa hoi. ((hieu va) OR (lieu va)) cam luc va ((thanh ve) or (hanh ve)) cau tren".
• Adding a wildcard symbol may retrieve word variants: te san ky tang xa hoi. ((hieu va) OR (lieu va)) cam luc va ((thanh ve) or (hanh ve)) cau tren*.