Perhaps you should try some spelling variations:
viec khoa » vien khoa, viec khong, lieu khoa
viec cho » viec nhom, viec cua, viec so
su triet » su viet, su tien, ve triet
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
cam ban » can ban, cac ban, cam bay

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 ban va su 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 ban va su triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((viec cho) or (viec khoa)) xuc cam ban va su triet*.