Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan, thuc day
phuc va » phuc vu, chuc va, thuc vat
van cau » van dau, van hau, van chat
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
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)) ty nang xa hoi. thien van cau ((phuc va) or (thuc va)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) ty nang xa hoi. thien van cau ((phuc va) OR (thuc va)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) ty nang xa hoi. thien van cau ((phuc va) or (thuc va)) hanh vai cua tre*.