Perhaps you should try some spelling variations:
cua triet » su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
cua viet » ca viet, hoa viet, cua vat
hien cac » thien cac, vien cac, hieu cac
vu sach » vu bach, su sach, vu khach
cac bao » cach bao, cac bai, cac ban
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
te sach » toc sach
bao va » bao ve, tao va, ban va
x hoi » xa hoi, o hoi, x ho

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

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