Perhaps you should try some spelling variations:
ban hanh » ban hang
kho tang » cao tang
hanh hai » thanh hai, nhanh hai, hang hai
tang xa » trang xa, tang ma, lang xa
cua tre » cuu tre, cua triet, dua tren
sai kho » dai kho, tai khoa, dai khoa
dua ban » dia ban, cua ban, qua ban
su sai » su tai, su hai, su dai
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai kho tang xa hoi. hieu ((ve cam) or (va cam)) dua ban hanh hai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai kho tang xa hoi. hieu ((ve cam) OR (va cam)) dua ban hanh hai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai kho tang xa hoi. hieu ((ve cam) or (va cam)) dua ban hanh hai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sai kho tang xa hoi. hieu ((ve cam) or (va cam)) dua ban hanh hai ((cua tre) OR (cua te))*.