Perhaps you should try some spelling variations:
manh nhanh » danh nhan, anh nhan, danh thanh
nhanh thi » nhanh thai, nhanh thuc, nhan tai
hieu van » hieu va, thien van, lieu va
duc manh » suc manh, duc anh, duc minh
thi cua » thai cua, thi cuc, tri cua
cau duc » cao duc, cau luc, chu duc
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, tu cach
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
o hoi » co hoi, o hoc, o hai

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 (te sach)) ty nang ((o hoi) or (co hoc)). hieu van cau duc manh nhanh thi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang ((o hoi) OR (co hoc)). hieu van cau duc manh nhanh thi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ty nang ((o hoi) or (co hoc)). hieu van cau duc manh nhanh thi cua tre*".