Perhaps you should try some spelling variations:
te sach » toc sach
tinh do » trinh do, tinh doi, tinh da
va tinh » may tinh
cam luc » cau luc
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ly nang » ky nang, ly hang, ly vang
do cua » doi cua, co cua, de cua
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((x hoi) OR (o hoi)). hieu va ((cam luc) OR (cam xuc)) va tinh do cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ((x hoi) OR (o hoi)). hieu va ((cam luc) or (cam xuc)) va tinh do cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((x hoi) OR (o hoi)). hieu va ((cam luc) or (cam xuc)) va tinh do cua tre*.