Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lai » thanh hai, thanh lap, thanh loi
sang dai » sang tai, lang dai, sang mai
toc sac » toc sach, toc san, hoc sach
lai cua » dai cua, hai cua, lai chau
duc ban » duc tan, duc van, dua ban
hieu va » hieu qua
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu van
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky sang dai hoi. ((hieu ve) or (((hieu va) or (lieu va)))) pham duc ban thanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky sang dai hoi. ((hieu ve) OR (((hieu va) OR (lieu va)))) pham duc ban thanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: toc sac ky sang dai hoi. ((hieu ve) or (((hieu va) or (lieu va)))) pham duc ban thanh lai cua te*.