Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
cac thue » cuc thue, cac thu, cach thuc
hang xa » hoang xa, hang va, hang ca
hieu ve » hieu va, hieu van
sach ly » sach lo, sach ty, sach hay
thue va » thuc va, thuyet va, thuc vat
va hanh » van hanh, va thanh, va danh
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) or (sach y)) hang xa hoi. hieu ve cac thue va hanh vai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ly) OR (sach y)) hang xa hoi. hieu ve cac thue va hanh vai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ly) or (sach y)) hang xa hoi. hieu ve cac thue va hanh vai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ly) or (sach y)) hang xa hoi. hieu ve cac thue va hanh vai ((cua triet) OR (su triet))*.