Perhaps you should try some spelling variations:
trinh ve » trinh he, trinh va, trinh vi
cau tren » cu tren, dau tren, ca tren
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
va cau » van cau, va cac, va dau
luc va » duc va, tuc va
loc va » hoc va
ve cau » ke cau, ve cac, le cau

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