Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cuu tre » cau tren, cau treo
dua ban » dia ban, cua ban, qua ban
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cua te, cua triet, dua tren
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
duc ban » duc tan, duc van, duc man
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky tang ma hoi. hieu ve pham ((duc ban) OR (dua ban)) thanh dai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang ma hoi. hieu ve pham ((duc ban) OR (dua ban)) thanh dai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang ma hoi. hieu ve pham ((duc ban) OR (dua ban)) thanh dai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang ma hoi. hieu ve pham ((duc ban) OR (dua ban)) thanh dai ((cua tre) or (cuu tre))*.