Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh tai » thanh hai, thanh toan, doanh tai
cham luc » cham soc, nhan luc, cham cuu
su sach » vu sach
tai cua » thai cua, tai cuc, tri cua
luc ban » duc ban, cuc ban, luc bat
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tang ma » tang van
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (so sach)) tay ((tang ma) or (mang may)) hoa. hieu va cham luc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) tay ((tang ma) OR (mang may)) hoa. hieu va cham luc ban thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) tay ((tang ma) or (mang may)) hoa. hieu va cham luc ban thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) tay ((tang ma) or (mang may)) hoa. hieu va cham luc ban thanh tai cua tre*.