Perhaps you should try some spelling variations:
phan thuc » nhan thuc, phap thuc, pham thuc
hanh vai » hanh vi, hanh va, hanh tai
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
canh may » canh tay, hanh may, anh mau
ve phan » va phan, ke phan, ve phat
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
x hoi » o hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((canh may) or (mang may)) nang ((x hoi) OR (xa hoi)). hieu ve phan thuc day hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((canh may) OR (mang may)) nang ((x hoi) OR (xa hoi)). hieu ve phan thuc day hanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((canh may) or (mang may)) nang ((x hoi) OR (xa hoi)). hieu ve phan thuc day hanh vai cua tre*".