Perhaps you should try some spelling variations:
dau tien » van tien
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
vai dau » va dau, van dau, xvii dau
hieu ve » hieu va, hieu van
te sach » toc sach
hang ca » hang va, nang cao, hang tai
ly hang » ly quang
bo sach » co sach, hoc sach
so sach » so sanh, co sach, hoc sach
ve cam » ve cham, ve cac, va cam
ca hoi » cau hoi, cua hoi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (((so sach) or (bo sach)))) ly hang ca hoi. hieu ve cam thuc day hanh vai dau tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (((so sach) OR (bo sach)))) ly hang ca hoi. hieu ve cam thuc day hanh vai dau tien.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (((so sach) or (bo sach)))) ly hang ca hoi. hieu ve cam thuc day hanh vai dau tien*.