Perhaps you should try some spelling variations:
sach cam » sach cap, mach cam, sach tham
dien cua » dieu cua, dien cuc, dien cu
te sach » toc sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, cua triet
soc va » loc va, doc va, goc va
x hoi » xa hoi, o hoi, x ho

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 cam nang x hoi. hieu vu cham ((soc va) or (hoc va)) tinh dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach cam nang x hoi. hieu vu cham ((soc va) OR (hoc va)) tinh dien cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach cam nang x hoi. hieu vu cham ((soc va) or (hoc va)) tinh dien cua tre*.