Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
tham luc » than luc, tham nuoc, nhan luc
va doanh » van doanh, vay doanh, va danh
cuu tre » cau tren, cau treo
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cua tre » cua te, cua triet, dua tren
ky lang » ky nang, ky dang, ky tang
bao ky » cao ky, ban ky, bac ky

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: te bao ky lang xa hoi. hieu va ((tham luc) OR (tham thuc)) va doanh tai ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te bao ky lang xa hoi. hieu va ((tham luc) or (tham thuc)) va doanh tai ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: te bao ky lang xa hoi. hieu va ((tham luc) or (tham thuc)) va doanh tai ((cua tre) OR (cuu tre))*.