Perhaps you should try some spelling variations:
tinh doi » trinh doc, trinh do, tinh hoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
va tinh » may tinh
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
x hoi » xa hoi, x ho, 5 hoi
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 hoi) or (o hoi)). hieu ve cam luc va tinh doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luc va tinh doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) or (o hoi)). hieu ve cam luc va tinh doi cuu tre*.