Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
thuc ban » thuoc ban, thuc dan, thu ban
thanh va » thanh van, hanh va, thanh ha
cam thuc » am thuc, nam thuc, cam thu
hieu va » lieu va, hieu qua
ly nang » ly hang, ly vang, ly quang
su sach » so sach, vu sach
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ly nang) OR (ky nang)) ma hoi. hieu va cam thuc ban thanh va ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ky nang)) ma hoi. hieu va cam thuc ban thanh va ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) OR (ky nang)) ma hoi. hieu va cam thuc ban thanh va ((cua triet) or (va triet))*".