Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
cam thuc » am thuc, nam thuc, cam thu
sach ky » sac ky, sach y, sach ty
doi cua » dai cua, hoi cua, dong cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
ve cam » ve cham, ve cac, va cam
sai ky » sac ky

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

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