Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
so sach » so sanh, co sach, hoc sach
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
bo sach » co sach, hoc sach
mai doi » moi doi, mai hoi, mai khoi
ve cam » ve cham, ve cac, va cam
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (bo sach)) v nang ((mai doi) or (lai hoi)). hieu ve cam thuc day hanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) v nang ((mai doi) OR (lai hoi)). hieu ve cam thuc day hanh vai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) v nang ((mai doi) or (lai hoi)). hieu ve cam thuc day hanh vai cua vat*.