Perhaps you should try some spelling variations:
hanh hoi » hanh thoi, hanh noi, hanh hoa
su triet » su viet, su tien, ve triet
ky tang » ky nang, ky dang, kho tang
hoc hoi » hoc khoi, hoc hoa, hoc noi
hoa doi » hoa dai, hoc doi, xoa doi
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
hoi su » hoi suc, khoi su, thoi su
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ((hoc hoi) or (hoa doi)). hieu ve am thuc va hanh hoi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((hoc hoi) OR (hoa doi)). hieu ve am thuc va hanh hoi su triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((hoc hoi) or (hoa doi)). hieu ve am thuc va hanh hoi su triet*.