Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van thanh » ban thanh, van tuan
cham cuu » cap cuu
thanh va » thanh van, hanh va, thanh ha
chat cua » nhat cua, chat va, chat huu
su triet » su viet, su tien, ve triet
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
te sach » toc sach
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (te sach)) y lang xa hoi. hieu vu ((cham cuu) OR (chat cua)) van thanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (te sach)) y lang xa hoi. hieu vu ((cham cuu) OR (chat cua)) van thanh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (te sach)) y lang xa hoi. hieu vu ((cham cuu) OR (chat cua)) van thanh va su triet".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (te sach)) y lang xa hoi. hieu vu ((cham cuu) OR (chat cua)) van thanh va su triet*.