Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham luc » cham soc, nhan luc, cham cuu
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
sach tu » cach tu, sach ty, sach uu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va

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

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