Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
qua ban » cua ban
van cam » van nam, van lam, van cau
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky tang xa hoi. hieu van cam ((qua ban) or (qua quan)) ((thanh hai) OR (thanh san)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. hieu van cam ((qua ban) OR (qua quan)) ((thanh hai) OR (thanh san)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. hieu van cam ((qua ban) or (qua quan)) ((thanh hai) OR (thanh san)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. hieu van cam ((qua ban) or (qua quan)) ((thanh hai) OR (thanh san)) cua tre*.