Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, nam duoc
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
ma hoi » xa hoi, ma hoa, me 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 cac ky sang ((ma hoi) OR (mai hoi)). hieu ve ((cam duc) or (pham duc)) va thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky sang ((ma hoi) OR (mai hoi)). hieu ve ((cam duc) OR (pham duc)) va thanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky sang ((ma hoi) OR (mai hoi)). hieu ve ((cam duc) or (pham duc)) va thanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky sang ((ma hoi) OR (mai hoi)). hieu ve ((cam duc) or (pham duc)) va thanh vai cuu tre*.