Perhaps you should try some spelling variations:
kho tang » cao tang
thai cua » than cua, tai cuc, dai cua
ban hanh » ban hang
dua ban » dia ban, cua ban, qua ban
tang xa » trang xa, tang ma, lang xa
sai kho » dai kho, tai khoa, dai khoa
su sai » su tai, su hai, su dai
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai

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 ((thai cua) OR (tri cua)) tre~.
• 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 ((thai cua) OR (tri cua)) tre.
• 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 ((thai cua) OR (tri cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sai kho tang xa hoi. hieu ((ve cam) or (va cam)) dua ban hanh ((thai cua) OR (tri cua)) tre*.