Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
ly sang » ly hang, ly san, ly vang
sang ma » tang ma, nang ma, sang tao
dai thu » dai thua, dai thuc, doi thu
thu vat » thuc vat, thu va, thuat vat
danh vi » dinh vi, danh di, danh va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ly sang ma hoa. dieu hien dai thu vat ((danh vi) OR (hanh vi)) cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ly sang ma hoa. dieu hien dai thu vat ((danh vi) OR (hanh vi)) cua vat~".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ly sang ma hoa. dieu hien dai thu vat ((danh vi) OR (hanh vi)) cua vat*.