Perhaps you should try some spelling variations:
trinh ven » trinh van, trinh ve, trinh den
cau tren » cu tren, dau tren, ca tren
tinh ven » tinh yen, trinh van, tinh dien
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
luc va » duc va, tuc va, loc va
san ky » sang ky, van ky, dan ky
va cam » va cham, va cac, va cao
tu san » thu san, tu ban, tu can

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: tu san ky tang xa hoi. hieu va cam luc va ((((tinh ven) OR (sinh vien))) OR (trinh ven)) cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky tang xa hoi. hieu va cam luc va ((((tinh ven) OR (sinh vien))) or (trinh ven)) cau tren~".
• Adding a wildcard symbol may retrieve word variants: tu san ky tang xa hoi. hieu va cam luc va ((((tinh ven) OR (sinh vien))) or (trinh ven)) cau tren*.