Perhaps you should try some spelling variations:
thuoc day » thuc day, thuoc dac, thuoc dang
sach thi » sach thu, sach tai, sach thieu
cua viet » ca viet, hoa viet, cua vat
day hanh » day nhanh, day thanh, dao hanh
va triet » va thiet, va trien, ve triet
thanh xa » thanh ha, thanh va, thanh ba
hanh va » hang va, hanh vi
su sach » so sach, vu sach
he nam » ha nam, nghe nam
ve nam » va nam, le nam, te 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 thi thanh xa hoi. hieu ((ve nam) OR (he nam)) thuoc day hanh va ((cua viet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thi thanh xa hoi. hieu ((ve nam) OR (he nam)) thuoc day hanh va ((cua viet) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thi thanh xa hoi. hieu ((ve nam) OR (he nam)) thuoc day hanh va ((cua viet) or (va triet))*".