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
sach ly » sach y, sach lo, sach ty
hanh de » hanh ve, hanh kem
cac xuc » cam xuc, cac nuoc, chat xuc
ly nang » ky nang, ly hang, ly vang
su tien » su kien, su hien, tu tieng
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
o hoc » co hoc, mo hoc, so hoc

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 ly nang o hoc. lieu va cac xuc 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 ly nang o hoc. lieu va cac xuc va ((hanh de) OR (hang doi)) ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: thuat sach ly nang o hoc. lieu va cac xuc va ((hanh de) or (hang doi)) ((su triet) or (su tien))*.