Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
chang xu » chang xue, chao xu, thong xu
hieu van » hieu va, thien van, lieu va
duc ban » duc tan, duc van, dua ban
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
hang x » nang x, hoang xa, hang nxb

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach tu) or (sach thieu)) ((hang x) or (chang xu)) hoi. hieu van cau duc ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach tu) OR (sach thieu)) ((hang x) OR (chang xu)) hoi. hieu van cau duc ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) or (sach thieu)) ((hang x) or (chang xu)) hoi. hieu van cau duc ban thanh dai cua tre*.