Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
nam thuc » nam thuoc, nam thu, nam tu
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
hoa hoi » khoa hoi, hoa hoc, hoc hoi
hoa doi » hoa dai, hoc doi, xoa doi
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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 ((hoa hoi) or (hoa doi)). hieu ve ((nam thuc) OR (am thuc)) va hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((hoa hoi) OR (hoa doi)). hieu ve ((nam thuc) OR (am thuc)) va hanh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve ((nam thuc) OR (am thuc)) va hanh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve ((nam thuc) OR (am thuc)) va hanh hai cua triet*.