Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh di » thanh doi, thanh de, thanh do
nam thuc » nam thuoc, am thuc, nam thu
ha thanh » va thanh, pham thanh, phan thanh
su sach » so sach, vu sach
ty hang » ty xang, thi hang, thu hang
ly hang » ly quang
hieu ve » hieu va, hieu van
thuc ha » thu ha, thuc va, thuc hanh
ve nam » he nam, va nam, le nam

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 ((ty hang) or (ly hang)) xa hoi. hieu ve nam thuc ha thanh di ((cua triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ly hang)) xa hoi. hieu ve nam thuc ha thanh di ((cua triet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ly hang)) xa hoi. hieu ve nam thuc ha thanh di ((cua triet) or (hoa viet))*.