Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
thu sach » tu sach, thuat sach, thuoc sach
chuc day » thuc day, chuc dao, chuc danh
day hanh » day nhanh, day thanh, dao hanh
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, tao hoi
cao hoc » co hoc, cho hoc, chat hoc
hieu vi » hieu voi, hieu va, hieu ve
hanh di » hanh vi, hanh de, hang di
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 ky nang ((cao hoi) or (cao hoc)). hieu vi pham chuc day hanh di ((cua tu) OR (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((cao hoi) OR (cao hoc)). hieu vi pham chuc day hanh di ((cua tu) OR (cua cu))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((cao hoi) or (cao hoc)). hieu vi pham chuc day hanh di ((cua tu) OR (cua cu))*".