Perhaps you should try some spelling variations:
tinh lai » tinh lao, tinh hai, minh lai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
va tinh » may tinh
cua tre » cua te, cua triet, dua tren
cac xuc » cam xuc, cac nuoc, chat xuc
sach ky » sac ky, sach y, sach ty
van cac » van hac, van cau, van bac
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ((x ho) or (o hoi)). hieu van cac xuc va tinh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x ho) OR (o hoi)). hieu van cac xuc va tinh lai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x ho) or (o hoi)). hieu van cac xuc va tinh lai ((cua tre) or (cuu tre))*.