Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
thu sach » tu sach, thuat sach, thuoc sach
tay lang » tai lang, tay tang, tay quang
va doanh » vay doanh, va danh, hoa doanh
cua tre » cua te, cuu tre, cua triet
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
va cua » va chua, via cua, ca cua
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((tay lang) or (ky dang)) xa hoi. hieu va cam luc ((va doanh) or (van doanh)) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((tay lang) OR (ky dang)) xa hoi. hieu va cam luc ((va doanh) OR (van doanh)) va cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((tay lang) or (ky dang)) xa hoi. hieu va cam luc ((va doanh) or (van doanh)) va cua tre*.