Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cac toc » cac toi, cac nuoc, cac thoi
dan hai » doan hai, dang hai, dan khai
toc ta » toc tay, toc thai
ta dan » tam dan, tap dan, ca dan

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 ky nang xa hoi. lieu va cac toc ta dan hai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. lieu va cac toc ta dan hai ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. lieu va cac toc ta dan hai ((cua triet) or (su triet))*.