Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
tu sach » thu sach, te sach, tu cach
ve cac » va cac, vien cac
loc va » hoc va, luc va

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