Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ha thanh » va thanh, phan thanh, thi thanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cac tac » cac toc, cac bac, cac dac
doi cua » dai cua, hoi cua
ma hoi » mai hoi, ma hoa, me hoi

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 ky nang ((ma hoi) OR (xa hoi)). lieu va cac tac ((ha thanh) or (pham thanh)) doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (xa hoi)). lieu va cac tac ((ha thanh) OR (pham thanh)) doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (xa hoi)). lieu va cac tac ((ha thanh) or (pham thanh)) doi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) OR (xa hoi)). lieu va cac tac ((ha thanh) or (pham thanh)) doi cua triet*.