Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
su sach » so sach, vu sach
dang xa » dang xay, lang xa, dang va
dang ha » dong ha, dung ha, lang ha
qua cam » qua cham, qua cac, qua ca
sach 2 » sach y

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 2 ((dang xa) or (dang ha)) hoi. hieu qua cam duc van hanh vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 2 ((dang xa) OR (dang ha)) hoi. hieu qua cam duc van hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 2 ((dang xa) or (dang ha)) hoi. hieu qua cam duc van hanh vi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach 2 ((dang xa) or (dang ha)) hoi. hieu qua cam duc van hanh vi ((cua triet) OR (su triet))*.