Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
ban thanh » ban hanh, ban hang
qua pham » quan pham, quy pham, qua cham
thuc ban » thuoc ban, thuc dan, thu ban
mai hoi » mai khoi, dai hoi, lai hoi
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
tai su » tai so, lai su, tai du

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 nang ((ma hoi) or (mai hoi)). hieu qua pham thuc ban thanh ((tai su) or (tai tu)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((ma hoi) OR (mai hoi)). hieu qua pham thuc ban thanh ((tai su) OR (tai tu)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (mai hoi)). hieu qua pham thuc ban thanh ((tai su) or (tai tu)) triet*.