Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
ve nam » he nam, va nam, le nam
sac ky » cac ky, sai ky
vai va » mai va, hai va, lai va
dai va » mai va
tu sac » tu sach, tu cac, tu san
bi va » bo 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 nam thuc van hanh ((bi va) or (((vai va) or (dai va)))) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang xa hoi. hieu ve nam thuc van hanh ((bi va) OR (((vai va) OR (dai va)))) triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang xa hoi. hieu ve nam thuc van hanh ((bi va) or (((vai va) or (dai va)))) triet*.