Perhaps you should try some spelling variations:
mai hoi » mai khoi, dai hoi, mai doi
hai cua » thai cua, dai cua, hoi cua
dan hai » doan hai, dang hai, dan khai
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
cam duc » cao duc, pham duc, nam duoc
te cao » te bao
va dan » ca dan, va dao, va dau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cao ky sang ((mai hoi) OR (lai hoi)). hieu ve ((cam duc) or (cam xuc)) va dan hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cao ky sang ((mai hoi) OR (lai hoi)). hieu ve ((cam duc) OR (cam xuc)) va dan hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cao ky sang ((mai hoi) OR (lai hoi)). hieu ve ((cam duc) or (cam xuc)) va dan hai cua te".
• Adding a wildcard symbol may retrieve word variants: te cao ky sang ((mai hoi) OR (lai hoi)). hieu ve ((cam duc) or (cam xuc)) va dan hai cua te*.