Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cham luc » cham soc, nhan luc, cham cuu
vang cuu » vang cua, mang cua, hang cua
va doanh » vay doanh, va danh, hoa doanh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sach lo » sach dao, sach doi, sach hoi
cuu tre » cua tre, cau tren, cau treo
sach o » sac o, sach y, mach o

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 o) OR (sach lo)) lang xa hoi. hieu ve cham luc ((va doanh) or (van doanh)) vang cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach o) OR (sach lo)) lang xa hoi. hieu ve cham luc ((va doanh) OR (van doanh)) vang cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach o) OR (sach lo)) lang xa hoi. hieu ve cham luc ((va doanh) or (van doanh)) vang cuu tre*".