Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cuu tre » cau tren, cau treo
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cua triet, dua tren
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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 lang xa hoi. ((hieu ve) or (hieu van)) cam duc ban hanh hai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky lang xa hoi. ((hieu ve) OR (hieu van)) cam duc ban hanh hai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky lang xa hoi. ((hieu ve) or (hieu van)) cam duc ban hanh hai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sac ky lang xa hoi. ((hieu ve) or (hieu van)) cam duc ban hanh hai ((cua tre) OR (cuu tre))*.