Perhaps you should try some spelling variations:
doanh sang » doanh quang, doanh ban, doanh van
toc sach » doc sach, thuoc sach, nuoc sach
sang cua » mang cua, song cua, hang cua
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) ky nang xa hoi. hieu va cham ((tuc va) or (truc va)) doanh sang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang xa hoi. hieu va cham ((tuc va) OR (truc va)) doanh sang cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky nang xa hoi. hieu va cham ((tuc va) or (truc va)) doanh sang cua tre*.