Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
tam thuc » tham thuc, am thuc, nam thuc
thuc ban » thuoc ban, thuc dan, thu ban
ban hang » ngan hang
hang vi » hang va, hanh vi, hang di
ke mang » ke nang, ke trang
may hoi » may thoi, tay hoi, may hmi
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
tu sai » tu bai, tu san, tu cai
sai ke » sai ky
va tam » van tam, va tham, va tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ke mang ((may hoi) or (mai hoi)). hieu va tam thuc ban hang vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ke mang ((may hoi) OR (mai hoi)). hieu va tam thuc ban hang vi ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ke mang ((may hoi) or (mai hoi)). hieu va tam thuc ban hang vi ((cua triet) OR (su triet))*".