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