Perhaps you should try some spelling variations:
va triet » va thiet, va trien, cua triet
ve triet » va trien, su triet
vu sach » vu bach, su sach, vu khach
lang xa » lang ha, dang xay, lang van
cam luc » cam xuc
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
y lang » o lang, _ lang, tay lang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y lang xa hoi. hieu qua ((cam luc) OR (cau luc)) va hanh vi ((va triet) OR (ve triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y lang xa hoi. hieu qua ((cam luc) or (cau luc)) va hanh vi ((va triet) OR (ve triet))~".
• Adding a wildcard symbol may retrieve word variants: vu sach y lang xa hoi. hieu qua ((cam luc) or (cau luc)) va hanh vi ((va triet) OR (ve triet))*.