Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
hieu vien » hieu hien, hieu viec, thieu nien
va triet » va thiet, va trien, ve triet
cao nuoc » cap nuoc, cac nuoc, cao ngoc
van hanh » van thanh, ban hanh, van anh
vien cao » vien cac, vien dai, vien da
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu vien cao nuoc ((van hanh) or (va danh)) le ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu vien cao nuoc ((van hanh) OR (va danh)) le ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu vien cao nuoc ((van hanh) or (va danh)) le ((cua triet) or (va triet))*.