Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan tai » hang tai, van tai, toan tai
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
cao suc » cao su, cao duc
van cao » van dao, van bao, van hao
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet

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) or (su sach)) ky nang xa hoi. hieu van cao suc manh ((hanh tai) or (nhan tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ky nang xa hoi. hieu van cao suc manh ((hanh tai) OR (nhan tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ky nang xa hoi. hieu van cao suc manh ((hanh tai) or (nhan tai)) cua tre*.