Perhaps you should try some spelling variations:
tham luc » tham nuoc, tham thuc, nhan luc
than luc » nhan luc, than duc, thanh luu
va doanh » van doanh, vay doanh, va danh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
tai ky » thai ky, trai ky, sai ky

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

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