Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, cuoc cach, cuon sach
chuc van » chu van, chuc va, thuc van
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
cau chuc » cau chu, cau phuc, canh chuc
hanh di » hanh vi, hanh de, hang di
hieu ke » hieu kem, chieu ke, hieu ky
ke cau » ket cau
nang o » nang co, nang ho, nang ro
cua tu » cua tuc, cua su, cua cu
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) or (hoc sach)) ky nang o hoi. hieu ke cau chuc van hanh di ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (hoc sach)) ky nang o hoi. hieu ke cau chuc van hanh di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) or (hoc sach)) ky nang o hoi. hieu ke cau chuc van hanh di ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) or (hoc sach)) ky nang o hoi. hieu ke cau chuc van hanh di ((cua te) OR (cua tu))*.