Perhaps you should try some spelling variations:
va trinh » van trinh, va tinh, lap trinh
trinh le » trinh ly, thinh le, trinh he
cau tren » cu tren, dau tren, ca tren
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
te san » te ban, ke san, tu san
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
le cau » ke cau, le mau, le cap

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