Perhaps you should try some spelling variations:
sach tranh » canh tranh
sach tren » sach tien
su triet » su viet, su tien, ve triet
cham duc » pham duc, cham soc, pham duy
dang de » dang deo, dung de, dang do
danh de » hanh de, dan de, danh di
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tranh) or (sach tren)) nang x hoi. hieu tu cham duc va ((danh de) or (dang de)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tranh) OR (sach tren)) nang x hoi. hieu tu cham duc va ((danh de) OR (dang de)) su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tranh) or (sach tren)) nang x hoi. hieu tu cham duc va ((danh de) or (dang de)) su triet*.