Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cham luc » cham soc, nhan luc, cham cuu
vang cua » mang cua, hang cua, tang cua
tay lang » tai lang, tay tang, tay quang
va doanh » vay doanh, va danh, hoa doanh
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, yen lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y lang) OR (tay lang)) xa hoi. hieu ve cham luc ((va doanh) or (van doanh)) vang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (tay lang)) xa hoi. hieu ve cham luc ((va doanh) OR (van doanh)) vang cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y lang) OR (tay lang)) xa hoi. hieu ve cham luc ((va doanh) or (van doanh)) vang cua tre*".