Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
van cam » van nam, van lam, van cau
so sanh » do sanh
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
sanh y » sinh y, anh y, hanh y

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh y ((dang xay) or (lang ha)) hoi. hieu van cam xuc ((va hanh) or (va danh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh y ((dang xay) OR (lang ha)) hoi. hieu van cam xuc ((va hanh) OR (va danh)) lai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh y ((dang xay) or (lang ha)) hoi. hieu van cam xuc ((va hanh) or (va danh)) lai cua tre*.