Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
cua triet » cua viet, su triet, va triet
xa huong » xa phuong, xa muong, ga huong
va huong » va thuong, va phuong, va tuong
sach ky » sac ky, sach y, sach ty
hieu va » lieu va
cao tuc » dao tuc, cao duc, cao suc
doi cua » dai cua, hoi cua
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: cuon sach ky nang x hoi. ((hieu va) OR (hieu qua)) cao tuc ((xa huong) or (va huong)) doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuon sach ky nang x hoi. ((hieu va) OR (hieu qua)) cao tuc ((xa huong) OR (va huong)) doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cuon sach ky nang x hoi. ((hieu va) OR (hieu qua)) cao tuc ((xa huong) or (va huong)) doi cua triet".
• Adding a wildcard symbol may retrieve word variants: cuon sach ky nang x hoi. ((hieu va) OR (hieu qua)) cao tuc ((xa huong) or (va huong)) doi cua triet*.