Perhaps you should try some spelling variations:
phat thuc » phap thuc, pham thuc, phan thuc
thu sach » tu sach, thuat sach, thuoc sach
dao hanh » dao thanh, dang hanh, ban hanh
day hanh » day nhanh, day thanh, day manh
nang noi » nang doc
hieu ve » hieu va, hieu van
ve phat » va phat, te phat, de phat
noi hoi » noi doi, doi hoi, hoi hoi
sach ky » sac ky, sach y, sach ty
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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 phat thuc ((day hanh) or (dao hanh)) di ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang noi hoi. hieu ve phat thuc ((day hanh) OR (dao hanh)) di ((cua tu) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang noi hoi. hieu ve phat thuc ((day hanh) or (dao hanh)) di ((cua tu) or (cua su))*.