Perhaps you should try some spelling variations:
doanh tang » doanh sang, doanh tong, doanh thanh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc va » tuc va, loc va
cua te » cua tu

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

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