Perhaps you should try some spelling variations:
chinh giao » hinh giao, trinh giao, minh giao
hieu viec » nhieu viec, hieu ve, sieu viet
cua triet » su triet, va triet
viec cac » vien cac, viec cua, viec lam
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
cac duc » cac du, cao duc, cac dac
duc tai » duc thai, luc tai, duc tan
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang x hoi. hieu viec cac duc tai chinh giao ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu viec cac duc tai chinh giao ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu viec cac duc tai chinh giao ((cua triet) or (cua viet))*.