Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa
cham duc » pham duc, cham soc, pham duy
ky tang » ky dang, kho tang, ky trong
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc ban » duc tan, duc van, dua ban
cuu tre » cua tre, cau tren, cau treo
su bac » xu bac, du bac, su cac

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

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