Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau tren » cu tren, dau tren, ca tren
cham duc » pham duc, cham soc, pham duy
ban hanh » ban hang
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
y nang » ky nang, ly nang, v nang
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: tu sach y nang o hoi. ((hieu ve) OR (hieu va)) cham duc ban hanh vi ((cua triet) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. ((hieu ve) OR (hieu va)) cham duc ban hanh vi ((cua triet) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang o hoi. ((hieu ve) OR (hieu va)) cham duc ban hanh vi ((cua triet) or (cau tren))*".