Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc ban » thuoc ban, thu ban, thuc van
hang hoi » hang hoa, hang hai, hang doi
thuc dan » thuc hanh, hoc dan, thuc vat
hieu ve » hieu va, hieu van
hoi cua » hoi chuc
ve nam » he nam, va nam, le nam
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
bo sac » bo sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sac ky nang ((ma hoi) or (xa hoi)). hieu ve nam ((thuc ban) OR (thuc dan)) hang hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sac ky nang ((ma hoi) OR (xa hoi)). hieu ve nam ((thuc ban) OR (thuc dan)) hang hoi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sac ky nang ((ma hoi) or (xa hoi)). hieu ve nam ((thuc ban) OR (thuc dan)) hang hoi cua triet*".