Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thanh cau » thanh chau, thanh mau, nhanh cau
van nhanh » van thanh, van hanh, van khanh
cau tren » cu tren, dau tren, ca tren
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac xuc » cam xuc, chat xuc, cac cuoc
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
o lai » o lao
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 y nang ((o hoi) or (o lai)). hieu ve ((cac xuc) OR (cac nuoc)) van nhanh thanh cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((o hoi) OR (o lai)). hieu ve ((cac xuc) OR (cac nuoc)) van nhanh thanh cau tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((o hoi) or (o lai)). hieu ve ((cac xuc) OR (cac nuoc)) van nhanh thanh cau tren*".