Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
truc may » tren may, truc va
tinh vi » trinh vi, tinh voi, tinh va
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
so sanh » do sanh
y lang » o lang, _ lang, tay lang
ve cac » va cac, vien cac
vi cua » vai cua, di cua
ve cam » ve cham, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) y lang xa hoi. hieu ((ve cam) OR (ve cac)) truc may tinh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) y lang xa hoi. hieu ((ve cam) OR (ve cac)) truc may tinh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) y lang xa hoi. hieu ((ve cam) OR (ve cac)) truc may tinh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y lang xa hoi. hieu ((ve cam) OR (ve cac)) truc may tinh vi cua triet*.