Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hanh vai » hanh vi, hanh va, hanh tai
vat hanh » vat thanh, van hanh, va hanh
sach thu » sach thue, sach thieu, sach tham
dai thuc » dan thuc, dai thu, dai thua
vai cua » dai cua, hai cua, lai cua
hang ca » hang va, nang cao, hang tai
sach tu » cach tu, sach ty, sach uu
hang ma » hang va, tang ma, nang ma

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: su ((sach tu) OR (sach thu)) ((hang ma) OR (hang ca)) hoi. hieu hien dai thuc vat hanh vai cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tu) or (sach thu)) ((hang ma) OR (hang ca)) hoi. hieu hien dai thuc vat hanh vai cua vat~".
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) or (sach thu)) ((hang ma) OR (hang ca)) hoi. hieu hien dai thuc vat hanh vai cua vat*.