Perhaps you should try some spelling variations:
ve triet » va trien, su triet
luoc can » luc canh, luoc dai, duoc cac
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
hoc can » hoc dan, hoc cao, hoc cac
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
vi ve » va ve, gi ve, ve ve

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) or (hoc can)))) hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang mai khoi. hieu ve cac ((duc van) OR (((luoc can) OR (hoc can)))) hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang mai khoi. hieu ve cac ((duc van) or (((luoc can) or (hoc can)))) hanh vi ve triet*.