Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
chien cac » hien cac, thien cac, chien cuoc
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
y nang » ky nang, ly nang, v nang
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: tu sach y nang x hoi. chieu chien cac duc ban ((((hang tai) OR (dung tai))) or (hang va)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. chieu chien cac duc ban ((((hang tai) OR (dung tai))) OR (hang va)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. chieu chien cac duc ban ((((hang tai) OR (dung tai))) or (hang va)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. chieu chien cac duc ban ((((hang tai) OR (dung tai))) or (hang va)) su triet*.