Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh doi » dinh moi, tinh doi, dinh toi
viec ban » viec lam, viec tai
ty hang » ly hang, ty xang, thi hang
viec va » vien va, viec cua, viec lam
va dinh » van dinh, va kinh, va tinh
ty nang » ky nang, ty xang, ly nang
doi cua » dai cua, hoi cua
so sach » so sanh, bo sach, co sach

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