Perhaps you should try some spelling variations:
luoc can » luc canh, hoc can, luoc dai
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
su triet » su tien, ve triet
su viet » so viet
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
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 van) OR (luoc can)) hanh vi ((su triet) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang mai khoi. hieu ve cac ((duc van) OR (luoc can)) hanh vi ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai khoi. hieu ve cac ((duc van) OR (luoc can)) hanh vi ((su triet) OR (su viet))*.