Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
luoc can » luc canh, hoc can, luoc dai
duc manh » duc anh, duc minh, duc tan
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
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 nang mai khoi. hieu ve cac ((((duc manh) or (suc manh))) or (luoc can)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang mai khoi. hieu ve cac ((((duc manh) OR (suc manh))) OR (luoc can)) hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai khoi. hieu ve cac ((((duc manh) or (suc manh))) or (luoc can)) hanh di cua triet*.