Perhaps you should try some spelling variations:
thanh thanh » nhanh thanh, thanh toan, thanh phan
thu thanh » thu thang, tu thanh, thuan thanh
thanh ca » thanh cha, thanh cac, thanh ha
vu kham » vu khanh
tu sach » thu sach, su sach, te sach
cam thu » nam thu, cac thu, ca thu
ca cua » co cua
va cam » va cham, va cac, va cao
cua te » cua tu
o hoi » co hoi, o hoc, o hoa
o hai » co hai, so hai, o lai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu kham) or (tu sach)) ky nang ((o hoi) or (o hai)). lieu va cam thu thanh thanh ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu kham) OR (tu sach)) ky nang ((o hoi) OR (o hai)). lieu va cam thu thanh thanh ca cua te.
• Adding a wildcard symbol may retrieve word variants: ((vu kham) or (tu sach)) ky nang ((o hoi) or (o hai)). lieu va cam thu thanh thanh ca cua te*.