Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
trung ca » trung cap, truong ca, trung cua
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van dac » van dau, van hac, van dan
cua tre » cua te, cuu tre, cua triet
ca dan » cac dan, ca dao
dan di » danh di, dan da, dan de
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang xa hoi. hieu ((van dac) or (van dao)) trung ca dan di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang xa hoi. hieu ((van dac) OR (van dao)) trung ca dan di cua tre*.