Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
sach tu » sach thu, cach tu, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
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. lieu va cac 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. lieu va cac duc va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (cach thuc)) nang mai hoi. lieu va cac duc va hanh vi cua triet*.