Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
su triet » su viet, ve triet
hang doi » hang di, hang loi, huong doi
hanh de » hanh ve, hanh kem
cam duc » cam xuc, cao duc, pham duc
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
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: thuat sach y nang o hoi. lieu va cam duc va ((hanh de) or (hang doi)) ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang o hoi. lieu va cam duc va ((hanh de) OR (hang doi)) ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang o hoi. lieu va cam duc va ((hanh de) or (hang doi)) ((su triet) or (su tien))*.