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

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)) pham duc ban thanh ((lap cua) or (tap 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)) pham duc ban thanh ((lap cua) OR (tap cua)) te.
• Adding a wildcard symbol may retrieve word variants: toc sac ky sang dai hoi. ((hieu ve) or (hieu va)) pham duc ban thanh ((lap cua) or (tap cua)) te*.