Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van tuan » van quan, van ban, anh tuan
tuan luc » than luc, tuan khuc, nhan luc
va doanh » van doanh, vay doanh, va danh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
te sai » te bai, te lai, te hai
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) or (te tai)) ky lang xa hoi. hieu van tuan luc va doanh tai ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te tai)) ky lang xa hoi. hieu van tuan luc va doanh tai ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) or (te tai)) ky lang xa hoi. hieu van tuan luc va doanh tai ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: ((te sai) or (te tai)) ky lang xa hoi. hieu van tuan luc va doanh tai ((cuu tre) OR (cua tre))*.