Perhaps you should try some spelling variations:
dung tren » dung trong, dung trung
thanh lai » thanh hai, thanh lap, thanh loi
ban thanh » ban hanh, ban hang
te sach » toc sach
duc ban » duc tan, duc van, dua ban
cuu tre » cua tre, cau tren, cau treo
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
ma hoi » mai hoi, xa hoi, ma hoa
v pham » vi pham, d pham
hieu v » hieu va, hieu ve, hieu 2

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 ((ty nang) or (ty hang)) ma hoi. hieu v pham duc ban thanh lai ((dung tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty hang)) ma hoi. hieu v pham duc ban thanh lai ((dung tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ty hang)) ma hoi. hieu v pham duc ban thanh lai ((dung tren) or (cuu tre))*.