Perhaps you should try some spelling variations:
khanh soc » khanh son, nhanh soc, khanh quoc
sach thu » sach thue, sach thieu, sach tham
vu khanh » vu thanh, van khanh, duy khanh
van hanh » van thanh, ban hanh, van anh
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, nang cao
lang ha » long ha
hieu vu » hieu va, hieu ve, hieu su
soc van » hoc van, oc van, sac van
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach thu ((nang ma) or (lang ha)) hoi. hieu vu khanh soc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thu ((nang ma) OR (lang ha)) hoi. hieu vu khanh soc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: co sach thu ((nang ma) or (lang ha)) hoi. hieu vu khanh soc van hanh vi cua tre*.