Perhaps you should try some spelling variations:
tai thanh » thi thanh, tai chinh, ban thanh
sach tai » sach bai, sach tham, sach dao
nhan luc » nang luc
su sach » so sach, vu sach
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
ma hoi » mai hoi, ma hoa, me hoi
va cua » va chua, via cua, ca cua

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 tai thanh ((ma hoi) or (xa hoi)). hieu va ((nhan luc) or (nhat cua)) va tinh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tai thanh ((ma hoi) OR (xa hoi)). hieu va ((nhan luc) OR (nhat cua)) va tinh va cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach tai thanh ((ma hoi) or (xa hoi)). hieu va ((nhan luc) or (nhat cua)) va tinh va cua tre*.