Perhaps you should try some spelling variations:
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
cuu tre » cau tren, cau treo
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cua triet, dua tren
hanh de » hanh ve, hanh kem
te sai » te tai, te bai, te lai
sai ky » sac ky
le cau » ke cau, le mau, le cap
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky lang xa hoi. hieu ((le cau) or (va dau)) thuc ban hanh de ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang xa hoi. hieu ((le cau) OR (va dau)) thuc ban hanh de ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sai ky lang xa hoi. hieu ((le cau) or (va dau)) thuc ban hanh de ((cua tre) or (cuu tre))*.