Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
danh van » doanh van, dang van, dinh van
van danh » van doanh, van anh, van hanh
sach thu » sach thue, sach thieu, sach tham
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
hieu vi » hieu voi, hieu va, hieu ve

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 thu ((nang xa) or (lang xa)) hoi. hieu vi ((pham duy) OR (pham duc)) van danh van cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu ((nang xa) OR (lang xa)) hoi. hieu vi ((pham duy) OR (pham duc)) van danh van cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu ((nang xa) or (lang xa)) hoi. hieu vi ((pham duy) OR (pham duc)) van danh van cau triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thu ((nang xa) or (lang xa)) hoi. hieu vi ((pham duy) OR (pham duc)) van danh van cau triet*.