Perhaps you should try some spelling variations:
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve am » va am
vi va » vi van, vai va, vu va

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 dang xa hoi. hieu ve am thuc ban hanh ((vi va) or (mai va)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu ve am thuc ban hanh ((vi va) OR (mai va)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu ve am thuc ban hanh ((vi va) or (mai va)) triet*.