Perhaps you should try some spelling variations:
nang tay » nang tai, nang tao, bang tay
ban hanh » ban hang
tay hoi » tay ho, tao hoi, tay thai
hieu ve » hieu van
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
hai cuc » hai cua, thai cua, hai huoc
su sac » su sach, su cac, su xac
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: su sac ky nang tay hoi. ((hieu ve) or (hieu va)) pham duc ban hanh ((hai cuc) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang tay hoi. ((hieu ve) OR (hieu va)) pham duc ban hanh ((hai cuc) OR (tai cuc)) tre.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang tay hoi. ((hieu ve) or (hieu va)) pham duc ban hanh ((hai cuc) or (tai cuc)) tre*.