Perhaps you should try some spelling variations:
ban hanh » ban hang
ky lang » ky dang, ky tang, tay lang
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
xuc ban » duc ban, cuc ban, quoc ban
tu sac » tu sach, tu cac, tu san
ve cam » ve cham, ve cac, va cam
di cua » doi cua, de cua, do 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 lang) OR (ky nang)) dai hoi. hieu ve cam xuc ban hanh ((di cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky nang)) dai hoi. hieu ve cam xuc ban hanh ((di cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) OR (ky nang)) dai hoi. hieu ve cam xuc ban hanh ((di cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) OR (ky nang)) dai hoi. hieu ve cam xuc ban hanh ((di cua) or (dai cua)) te*.