Perhaps you should try some spelling variations:
sach dao » lanh dao
hanh tai » thanh tai, hang tai, hinh tai
hieu van » hieu va, thien van, lieu va
han tai » hang tai, nhan tai, van tai
van cam » van nam, van lam, van cau
sach ly » sach y, sach lo, sach ty
hang xa » hoang xa, hang va, hang ca
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ly) or (sach dao)) hang xa hoi. hieu van cam xuc va ((hanh tai) or (han tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach dao)) hang xa hoi. hieu van cam xuc va ((hanh tai) OR (han tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach dao)) hang xa hoi. hieu van cam xuc va ((hanh tai) or (han tai)) cua tre*.