Perhaps you should try some spelling variations:
nhieu vien » nhieu viec, nhiet dien, thieu nien
trinh vi » trinh ve, trinh viet, trinh van
trinh va » trinh van, trinh vat, trinh ve
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
vien da » vien dai, hien dai
xuc lap » tuc lap, truc lap
cua tre » cua te, cuu tre, cua triet

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) or (su sach)) ky nang xa hoi. nhieu vien da xuc lap ((trinh vi) OR (trinh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang xa hoi. nhieu vien da xuc lap ((trinh vi) OR (trinh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang xa hoi. nhieu vien da xuc lap ((trinh vi) OR (trinh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang xa hoi. nhieu vien da xuc lap ((trinh vi) OR (trinh va)) cua tre*.