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

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 ma hoi. nhieu vien da xuc lap ((trinh vi) or (trinh viet)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ma hoi. nhieu vien da xuc lap ((trinh vi) OR (trinh viet)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ma hoi. nhieu vien da xuc lap ((trinh vi) or (trinh viet)) cua tre*.