Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet, va triet
ban hang » ngan hang
ky mang » ky nang, ke mang, ky dang
may hoi » may thoi, tay hoi, mai hoi
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va cua » va chua, via cua, ca 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 mang may hoi. hieu va nham thuc ((ban hanh) or (ban hang)) va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky mang may hoi. hieu va nham thuc ((ban hanh) OR (ban hang)) va cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky mang may hoi. hieu va nham thuc ((ban hanh) or (ban hang)) va cua triet*.