Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky dang ha noi. ((hieu ve) or (hieu van)) cam xuc van hanh hai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang ha noi. ((hieu ve) OR (hieu van)) cam xuc van hanh hai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach ky dang ha noi. ((hieu ve) or (hieu van)) cam xuc van hanh hai ((cua tre) or (cuu tre))*.