Perhaps you should try some spelling variations:
tang dai » tang tai, tang dan, lang dai
van hanh » van thanh, ban hanh, van anh
ky tang » ky nang, ky dang, kho tang
dai moi » doi moi, dai hoi
va hanh » va thanh, va danh, ban hanh
tu san » thu san, tu ban, tu can
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su
su cao » cu cao, vu cao, su co
san ky » sang ky, van ky, dan ky
su cam » su nam, su can, su lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky tang dai moi. hieu ((su cam) or (su cao)) xuc ((va hanh) or (van hanh)) vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky tang dai moi. hieu ((su cam) OR (su cao)) xuc ((va hanh) OR (van hanh)) vi cua cu.
• Adding a wildcard symbol may retrieve word variants: tu san ky tang dai moi. hieu ((su cam) or (su cao)) xuc ((va hanh) or (van hanh)) vi cua cu*.