Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hanh dai » hanh tai, vanh dai, thanh dat
ly quang » le quang, vu quang
quang xa » quan xa, quang ma, quang va
hanh dao » lanh dao, thanh dat, thanh dam
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
cac thu » cach thuc, cac thoi
hieu ve » hieu va, hieu van
thu va » thuc va, thue va, tu va
ve cac » va cac, vien cac

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 ly quang xa hoi. hieu ve cac thu va ((hanh dai) or (hanh dao)) ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly quang xa hoi. hieu ve cac thu va ((hanh dai) OR (hanh dao)) ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly quang xa hoi. hieu ve cac thu va ((hanh dai) or (hanh dao)) ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ly quang xa hoi. hieu ve cac thu va ((hanh dai) or (hanh dao)) ((cua triet) OR (su triet))*.