Perhaps you should try some spelling variations:
sieu viet » su viet, dien viet, bien viet
nhan viet » nhan vien, han viet, nhin viet
va trinh » van trinh, lap trinh, qua trinh
tu sach » thu sach, su sach, te sach
van cua » vang cua, ban cua, dan cua
va tinh » may tinh
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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 xa hoi. ((sieu viet) or (nhan viet)) cac xuc ((va trinh) OR (va tinh)) van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((sieu viet) OR (nhan viet)) cac xuc ((va trinh) OR (va tinh)) van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((sieu viet) or (nhan viet)) cac xuc ((va trinh) OR (va tinh)) van cua tre*".