Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
phap luu » phap lua, phap luat, phap luan
thi hang » thi hanh, thi nang, thi hong
cham luu » cham cuu, chat lua, cham lai
van anh » van thanh, tuan anh, van minh
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu ve, hieu su
ty hang » ly hang, ty xang, thu hang
anh vi » hanh vi, anh va, anh ve
vi su » va su, ve su, ki su

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 ((ty hang) OR (thi hang)) xa hoi. hieu vu ((cham luu) or (phap luu)) van anh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty hang) OR (thi hang)) xa hoi. hieu vu ((cham luu) OR (phap luu)) van anh vi su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty hang) OR (thi hang)) xa hoi. hieu vu ((cham luu) or (phap luu)) van anh vi su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty hang) OR (thi hang)) xa hoi. hieu vu ((cham luu) or (phap luu)) van anh vi su triet*.