Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
cham thuc » nham thuc, pham thuc, tham thuc
day manh » van manh, duc manh, ha manh
vu sach » vu bach, su sach, vu khach
sach lo » sach dao, sach doi, sach hoi
lo nang » ho nang, ly nang, loai nang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuu tre » cua tre, cau tren, cau treo
de cuu » de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach lo nang x hoi. hieu ve cham thuc ((day manh) or (day thanh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach lo nang x hoi. hieu ve cham thuc ((day manh) OR (day thanh)) de cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu sach lo nang x hoi. hieu ve cham thuc ((day manh) or (day thanh)) de cuu tre*.