Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thanh ve » hanh ve, thanh va, thanh vien
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
san ky » sang ky, van ky, dan ky
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc san ky tang xa hoi. hieu ve cac duc van ((thanh ve) or (thanh van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc san ky tang xa hoi. hieu ve cac duc van ((thanh ve) OR (thanh van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc san ky tang xa hoi. hieu ve cac duc van ((thanh ve) or (thanh van)) cua tre*.