Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cham luc » cham soc, nhan luc, cham cuu
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc ban » duc ban, cuc ban, luc bat

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 ty sang ((ma hoa) or (xa hoi)). hieu va cham luc ban thanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty sang ((ma hoa) OR (xa hoi)). hieu va cham luc ban thanh dai cua vat.
• Adding a wildcard symbol may retrieve word variants: su sach ty sang ((ma hoa) or (xa hoi)). hieu va cham luc ban thanh dai cua vat*.