Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hac dan » nhac dan, hoc dan, cac dan
van hac » van hoc, van ha, van hai
dai hoi » dai hoc, dai hai, dai moi
sach ky » sac ky, sach y, sach ty
ma hoi » mai hoi, xa hoi, ma hoa
dan va » doan va, dan ca, ban va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (cac ky)) nang ((ma hoi) or (dai hoi)). hieu van hac dan va danh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (cac ky)) nang ((ma hoi) OR (dai hoi)). hieu van hac dan va danh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (cac ky)) nang ((ma hoi) or (dai hoi)). hieu van hac dan va danh vi cua vat*.