Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
tham loc » tham nuoc, cham soc, tham hoa
lang xa » lang ha, dang xay, lang van
hau loc » huu loc, phau hoc
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, te sach
di cua » dai cua, doi cua, de cua

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 y ((nang x) or (lang xa)) hoi. hieu van ((tham loc) OR (hau loc)) van hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang x) OR (lang xa)) hoi. hieu van ((tham loc) OR (hau loc)) van hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang x) or (lang xa)) hoi. hieu van ((tham loc) OR (hau loc)) van hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang x) or (lang xa)) hoi. hieu van ((tham loc) OR (hau loc)) van hanh di cua triet*.