Perhaps you should try some spelling variations:
tinh vinh » tinh ninh, tinh binh, tinh hinh
vinh cau » sinh cau, vinh cuu, minh cau
cau treo » cau theo, cau tren, cau triet
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va tinh » may tinh
cham o » cham soc
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc
o va » do va, so va, co va

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 (o hoc))) or (x ho)). hieu vu cham o va tinh vinh cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((((o hoi) OR (o hoc))) OR (x ho)). hieu vu cham o va tinh vinh cau treo.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((((o hoi) or (o hoc))) or (x ho)). hieu vu cham o va tinh vinh cau treo*.