Perhaps you should try some spelling variations:
thanh nhan » thanh san, thanh toan, doanh nhan
thanh phan » thanh pho, thanh san, thanh toan
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
lai hoi » dai hoi, lai hoa, lai roi
ty sang » ty xang, ty hang, duy sang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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 ty sang ((lai hoi) or (xa hoi)). hieu va cac xuc va ((thanh nhan) OR (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty sang ((lai hoi) OR (xa hoi)). hieu va cac xuc va ((thanh nhan) OR (thanh phan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty sang ((lai hoi) or (xa hoi)). hieu va cac xuc va ((thanh nhan) OR (thanh phan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty sang ((lai hoi) or (xa hoi)). hieu va cac xuc va ((thanh nhan) OR (thanh phan)) cua tre*.