Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cach thuc » anh thuc, cac thu
dai hoi » dai hoc, dai hai, dai moi
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
sach tu » sach thu, cach tu, sach ty
mai hoi » mai khoi, lai hoi, mai doi
va cam » va cham, va cac, va cao
vi cua » vai cua, di 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 ((sach tu) or (cach thuc)) nang ((mai hoi) OR (dai hoi)). lieu va cam duc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (cach thuc)) nang ((mai hoi) OR (dai hoi)). lieu va cam duc va hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) or (cach thuc)) nang ((mai hoi) OR (dai hoi)). lieu va cam duc va hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (cach thuc)) nang ((mai hoi) OR (dai hoi)). lieu va cam duc va hanh vi cua triet*.