Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
nam duoc » nam thuoc, da duoc, dat duoc
dang hai » dang khai, hang hai, dung hai
danh hai » lanh hai, manh hai, danh hau
cuu tre » cua tre, cau tren, cau treo
ky sang » ky nang, ky dang, ky tang
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

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