Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
viec ban » viec lam, viec tai
dinh doi » dinh moi, tinh doi, dinh toi
va dinh » van dinh, va kinh, va tinh
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
viec va » vien va, viec cua, viec lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang xa hoi. hieu ((viec ban) or (viec va)) nuoc va dinh doi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang xa hoi. hieu ((viec ban) OR (viec va)) nuoc va dinh doi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. hieu ((viec ban) or (viec va)) nuoc va dinh doi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu ((viec ban) or (viec va)) nuoc va dinh doi ((cua triet) OR (su triet))*.