Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hang dien » quang dien, dang dieu, nhan dien
thu sach » tu sach, thuoc sach, thu hoach
hanh di » hanh vi, hanh de, hang di
cao luc » bao luc, cao duc, cao suc
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
nang o » nang co, nang ho, nang ro
y nang » ky nang, ly nang, v nang
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: ((thu sach) OR (thuat sach)) y nang o hoi. lieu va cao luc va ((hanh di) or (hang dien)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang o hoi. lieu va cao luc va ((hanh di) OR (hang dien)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) y nang o hoi. lieu va cao luc va ((hanh di) or (hang dien)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) y nang o hoi. lieu va cao luc va ((hanh di) or (hang dien)) cua tre*.