Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, vuc van
2 dang » 2 danh, b dang, o dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((_ dang) or (2 dang)) xa hoi. hieu qua cam xuc van hanh vi ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((_ dang) OR (2 dang)) xa hoi. hieu qua cam xuc van hanh vi ((cua triet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((_ dang) or (2 dang)) xa hoi. hieu qua cam xuc van hanh vi ((cua triet) OR (va triet))*".