Perhaps you should try some spelling variations:
tang mai » tang ma, tang tai, lang mai
hieu van » hieu va, thien van, lieu va
van chao » van chat, van hao, van cho
ban hanh » ban hang
ky tang » ky nang, ky dang, kho tang
mai hoi » mai khoi, dai hoi, lai hoi
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
xu ban » xuc ban, tu ban, vu ban
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang mai hoi. hieu van chao xu ban hanh ((vi cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang mai hoi. hieu van chao xu ban hanh ((vi cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang mai hoi. hieu van chao xu ban hanh ((vi cua) or (dai cua)) te*.