Perhaps you should try some spelling variations:
ve triet » va trien, su triet
lang van » dang van, tang van, hoang van
cac loc » cac lop, cac toc, cac hoc
nang xa » nang x, lang xa, nang ma
su tien » su kien, su hien, tu tieng
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
loc va » hoc va, luc va
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) or (lang van)) hoi. hieu ve cac loc va hanh vi ((su tien) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (lang van)) hoi. hieu ve cac loc va hanh vi ((su tien) OR (ve triet)).
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) or (lang van)) hoi. hieu ve cac loc va hanh vi ((su tien) or (ve triet))*.