Perhaps you should try some spelling variations:
nhanh thuc » nhan thuc, thanh thuy, anh thuc
nhanh thi » nhanh thai, nhan tai, nhanh ha
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
co hoi » co hoc, co loi
ve cac » va cac, vien cac
o hoi » o hoc, o hai, o 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 ty nang ((o hoi) or (co hoi)). hieu ve cac xuc van ((nhanh thi) OR (nhanh thuc)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((o hoi) OR (co hoi)). hieu ve cac xuc van ((nhanh thi) OR (nhanh thuc)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((o hoi) or (co hoi)). hieu ve cac xuc van ((nhanh thi) OR (nhanh thuc)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((o hoi) or (co hoi)). hieu ve cac xuc van ((nhanh thi) OR (nhanh thuc)) cua tre*.