Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
yen lang » den lang, ten lang, yen giang
van hanh » van thanh, ban hanh, van ban
su sach » so sach, vu sach
qua cam » qua cham, qua cac, qua ca
cam luc » cam xuc, cau luc
van anh » van thanh, tuan anh, van minh
doi cua » dai cua, hoi cua
_ lang » o lang, _ land

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 ((yen lang) or (_ lang)) xa hoi. hieu qua cam luc ((van hanh) OR (van anh)) doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((yen lang) OR (_ lang)) xa hoi. hieu qua cam luc ((van hanh) OR (van anh)) doi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((yen lang) or (_ lang)) xa hoi. hieu qua cam luc ((van hanh) OR (van anh)) doi cua triet*".