Perhaps you should try some spelling variations:
ban doanh » van doanh, san doanh, ban danh
sach hoa » sach ha, sach hoi, bach hoa
hoa lang » hoa dan, hoa van
ban hang » ngan hang
cua tre » cua te, cua triet, dua tren
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai buu, tai cua
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo
ve tai » te tai, de tai, le tai

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 hoa lang xa hoi. hieu ve tai cuu ((ban doanh) or (ban hang)) vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoa lang xa hoi. hieu ve tai cuu ((ban doanh) OR (ban hang)) vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoa lang xa hoi. hieu ve tai cuu ((ban doanh) or (ban hang)) vi ((cua tre) or (cuu tre))*.