Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
cam duc » cam xuc, pham duc, nam duoc
vai cua » dai cua, hai cua, lai cua
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cua cu » cua chu, cua cau, cua su
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky nang ((x hoi) or (o hoi)). hieu ve ((cam duc) OR (cao duc)) va thanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky nang ((x hoi) OR (o hoi)). hieu ve ((cam duc) OR (cao duc)) va thanh vai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky nang ((x hoi) or (o hoi)). hieu ve ((cam duc) OR (cao duc)) va thanh vai cua cu".
• Adding a wildcard symbol may retrieve word variants: tu san ky nang ((x hoi) or (o hoi)). hieu ve ((cam duc) OR (cao duc)) va thanh vai cua cu*.