Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, ve 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) or (sach y)) nang xa hoi. hieu ve cau truc va hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach y)) nang xa hoi. hieu ve cau truc va hanh vi ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach y)) nang xa hoi. hieu ve cau truc va hanh vi ((cua triet) or (su triet))*.