Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tang mai » tang ma, tang tai, lang mai
cham duc » pham duc, cham soc, pham duy
tu sach » thu sach, te sach, tu cach
va cham » va chat, va tham
lam cua » lam chat
duc ban » duc tan, duc van, dua ban
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ty tang » tay tang, ty xang, ty hang
su sach » so sach, vu sach

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) or (su sach)) ty tang mai hoi. hieu va cham duc ban thanh ((lam cua) OR (nam cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty tang mai hoi. hieu va cham duc ban thanh ((lam cua) OR (nam cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ty tang mai hoi. hieu va cham duc ban thanh ((lam cua) OR (nam cua)) tre*".