Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
bieu hien » dieu hien, dieu khien, bien phien
su triet » su viet, su tien, ve triet
hien cac » thien cac, vien cac, hieu cac
nang xa » nang x, lang xa, nang ma
su sach » so sach
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
vu sach » vu bach, vu khach
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (su sach)) ky nang xa hoi. bieu hien cac tuc va hanh di ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ky nang xa hoi. bieu hien cac tuc va hanh di ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (su sach)) ky nang xa hoi. bieu hien cac tuc va hanh di ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (su sach)) ky nang xa hoi. bieu hien cac tuc va hanh di ((cua triet) OR (su triet))*.