Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, pham thu
nham thuc » nhan thuc, nham thu, nhanh thuc
thu sach » tu sach, thuat sach, thuoc sach
nang noi » nang doc
nam thuc » nam thuoc, am thuc, nam thu
day hanh » day nhanh, day thanh, dao hanh
hanh di » hanh vi, hanh de, hang di
noi hoi » noi doi, doi hoi, hoi hoi
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
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: thu sach ky nang noi hoi. hieu ve ((pham thuc) or (((nham thuc) OR (nam thuc)))) day hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang noi hoi. hieu ve ((pham thuc) OR (((nham thuc) OR (nam thuc)))) day hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang noi hoi. hieu ve ((pham thuc) or (((nham thuc) OR (nam thuc)))) day hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang noi hoi. hieu ve ((pham thuc) or (((nham thuc) OR (nam thuc)))) day hanh di cua te*.