Perhaps you should try some spelling variations:
cua triet » su triet, va triet
chat luc » chat xuc, chat lua, nhan luc
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
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: ((tu sach) or (toc sach)) ky nang x ho. hieu ve chat luc va thanh di ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky nang x ho. hieu ve chat luc va thanh di ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky nang x ho. hieu ve chat luc va thanh di ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky nang x ho. hieu ve chat luc va thanh di ((cua triet) OR (cua viet))*.