Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh hai » thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
su sach » vu sach
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co 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: ((su sach) OR (so sach)) ky nang xa hoi. hieu van cam duc ban ((thanh hai) or (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. hieu van cam duc ban ((thanh hai) OR (thanh phan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky nang xa hoi. hieu van cam duc ban ((thanh hai) or (thanh phan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky nang xa hoi. hieu van cam duc ban ((thanh hai) or (thanh phan)) cua tre*.