Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
huong hoi » huong doi, duong hoi, huong hoa
va huong » va thuong, va phuong, va tuong
hieu van » hieu va, thien van, lieu va
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, dua tren
so sach » so sanh, co sach, hoc sach
nang xa » nang x, lang xa, nang ma
bo sach » co sach, hoc sach
van cam » van nam, van lam, van cau
tuc va » thuc va, truc va, tuc xa

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) or (bo sach)) ky nang xa hoi. hieu van cam tuc va huong hoi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ky nang xa hoi. hieu van cam tuc va huong hoi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ky nang xa hoi. hieu van cam tuc va huong hoi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ky nang xa hoi. hieu van cam tuc va huong hoi ((cua tre) OR (cua triet))*.