Perhaps you should try some spelling variations:
viec khoa » vien khoa, viec khong, lieu khoa
dau triet » cau triet, dau tien, su triet
viec cho » viec nhom, viec cua, viec so
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xuc cam » phuc cam
dan va » dan ca, ban va, han va

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 ((viec cho) or (viec khoa)) xuc cam ((dan va) OR (doan va)) dau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((viec cho) OR (viec khoa)) xuc cam ((dan va) OR (doan va)) dau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((viec cho) or (viec khoa)) xuc cam ((dan va) OR (doan va)) dau triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((viec cho) or (viec khoa)) xuc cam ((dan va) OR (doan va)) dau triet*.