Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
nang noi » nang doc
ve pham » vi pham, ve phan, ve phat
sach ky » sach y, sach ty, sach kem
noi hoi » noi doi, doi hoi, hoi hoi
v pham » vi pham, d pham
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sac ky)) nang noi hoi. hieu ((ve pham) OR (v pham)) thuc day hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang noi hoi. hieu ((ve pham) OR (v pham)) thuc day hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang noi hoi. hieu ((ve pham) OR (v pham)) thuc day hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang noi hoi. hieu ((ve pham) OR (v pham)) thuc day hanh dai cua te*.