Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
day hanh » day nhanh, day thanh, dao hanh
thuc day » thuc dan, thuc vat
ve pham » v pham, ve phan, ve phat
hanh di » hanh vi, hanh de, hang di
sach ky » sac ky, sach y, sach ty
hoi hoi » hoi hoc, hoc hoi, hoi doi
noi hoi » noi doi, doi hoi, noi hai
di cua » dai cua, doi cua, de cua
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: thuoc sach ky nang ((noi hoi) or (hoi hoi)). hieu ((ve pham) OR (vi pham)) thuc day hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky nang ((noi hoi) OR (hoi hoi)). hieu ((ve pham) OR (vi pham)) thuc day hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky nang ((noi hoi) or (hoi hoi)). hieu ((ve pham) OR (vi pham)) thuc day hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky nang ((noi hoi) or (hoi hoi)). hieu ((ve pham) OR (vi pham)) thuc day hanh di cua te*.