Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
hieu ve » hieu van
tu sach » thu sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
ly lang » ly hang, ly vang, le lang
su sach » so sach, vu sach
soc va » hoc va, loc va, doc va
vi cua » vai cua, di 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) or (su sach)) ly lang xa hoi. ((hieu ve) OR (hieu va)) cham soc va thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ly lang xa hoi. ((hieu ve) OR (hieu va)) cham soc va thanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ly lang xa hoi. ((hieu ve) OR (hieu va)) cham soc va thanh vi cua triet*".