Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach hoi » sach doi, sach moi, cach thoi
ban hanh » ban hang
hoi nang » hoi lang, ho nang, hoa nang
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
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 hoi nang o hoi. hieu ve cam xuc ((ban hanh) or (va danh)) vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoi nang o hoi. hieu ve cam xuc ((ban hanh) OR (va danh)) vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoi nang o hoi. hieu ve cam xuc ((ban hanh) or (va danh)) vi ((cua tre) OR (cuu tre))*".