Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
cham tuc » pham thuc, tham thuc, cham soc
hanh di » hanh vi, hanh de, hang di
xa hanh » xa thanh, xa khanh, va hanh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
di cua » dai cua, doi cua, de 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 ((ty hang) or (ly hang)) xa hoi. hieu ve ((cham tuc) OR (nham thuc)) xa hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty hang) OR (ly hang)) xa hoi. hieu ve ((cham tuc) OR (nham thuc)) xa hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty hang) or (ly hang)) xa hoi. hieu ve ((cham tuc) OR (nham thuc)) xa hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ly hang)) xa hoi. hieu ve ((cham tuc) OR (nham thuc)) xa hanh di cua triet*.