Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
phap luu » phap lua, phap luat, phap luan
cham luu » cham cuu, chat lua, cham lai
sach ly » sach y, sach lo, sach ty
hanh ki » hanh vi, hanh ky, hanh kien
tu sach » thu sach, su sach, te sach
hang xa » hoang xa, hang ca, lang xa
hieu vu » hieu va, hieu ve, hieu su
ki su » ky 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 ly ((hang xa) OR (hang va)) hoi. hieu vu ((cham luu) or (phap luu)) van hanh ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly ((hang xa) OR (hang va)) hoi. hieu vu ((cham luu) OR (phap luu)) van hanh ki su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly ((hang xa) OR (hang va)) hoi. hieu vu ((cham luu) or (phap luu)) van hanh ki su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ly ((hang xa) OR (hang va)) hoi. hieu vu ((cham luu) or (phap luu)) van hanh ki su triet*.