Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuu gia » cuu giai, cuu giao, cum gia
cua gia » cua giao, qua gia
ve cau » ke cau, va cau, ve cac
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 cac ky nang ((o hoi) or (x ho)). hieu ve cham ((cuu gia) OR (cua gia)) thanh ve cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((o hoi) OR (x ho)). hieu ve cham ((cuu gia) OR (cua gia)) thanh ve cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((o hoi) or (x ho)). hieu ve cham ((cuu gia) OR (cua gia)) thanh ve cau tren".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((o hoi) or (x ho)). hieu ve cham ((cuu gia) OR (cua gia)) thanh ve cau tren*.