Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hanh lai » hanh lam, thanh lap, thanh loi
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
su xac » su cac
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su xac) or (pu xac)) ky lang xa hoi. hieu ve cam thuc day ((hanh lai) OR (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su xac) OR (pu xac)) ky lang xa hoi. hieu ve cam thuc day ((hanh lai) OR (hanh tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su xac) or (pu xac)) ky lang xa hoi. hieu ve cam thuc day ((hanh lai) OR (hanh tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su xac) or (pu xac)) ky lang xa hoi. hieu ve cam thuc day ((hanh lai) OR (hanh tai)) cua tre*.