Perhaps you should try some spelling variations:
doanh tang » doanh sang, doanh tong, doanh thanh
tang cua » mang cua, hang cua, tang luan
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc 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 sach y nang xa hoi. hieu va cam ((luc va) OR (duc va)) doanh tang cua tre~.
• 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".
• 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*.