Perhaps you should try some spelling variations:
cua triet » su triet, va triet
nghe nam » nghe lam, nghiep nam, nghe nano
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dan hai » doan hai, dang hai, dan khai
he nam » ha nam
xe dan » ke dan, le dan, he dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ((he nam) OR (nghe nam)) thu xe dan hai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ((he nam) OR (nghe nam)) thu xe dan hai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu ((he nam) OR (nghe nam)) thu xe dan hai ((cua triet) or (cua viet))*.