Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc dan » thuc hanh, hoc dan
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
ve nam » he nam, va nam, le nam
va cua » va chua, via cua, ca cua

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 ((y lang) OR (_ lang)) xa hoi. hieu ve nam ((thuc dan) or (thuc vat)) hanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y lang) OR (_ lang)) xa hoi. hieu ve nam ((thuc dan) OR (thuc vat)) hanh va cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y lang) OR (_ lang)) xa hoi. hieu ve nam ((thuc dan) or (thuc vat)) hanh va cua triet*".