Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
sach tai » sach bai, sach tham, sach dao
ve triet » va trien
hanh vai » hanh vi, hanh va, hanh tai
cham tuc » nham thuc, pham thuc, tham thuc
tai hang » thai hang, thi hang, tai lang
su triet » su viet, su tien
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
hang xa » hoang xa, hang va, hang ca
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tai hang xa hoi. ((hieu va) or (lieu va)) cham tuc va hanh vai ((ve triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tai hang xa hoi. ((hieu va) OR (lieu va)) cham tuc va hanh vai ((ve triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tai hang xa hoi. ((hieu va) or (lieu va)) cham tuc va hanh vai ((ve triet) OR (su triet))*".