Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
chat luoc » chat luong, chat hoc, chat xuc
van hanh » van thanh, ban hanh, van anh
va chat » van chat, va phat, cao chat
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach ty)) nang x hoi. hieu va chat luoc ((van hanh) or (van minh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang x hoi. hieu va chat luoc ((van hanh) OR (van minh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang x hoi. hieu va chat luoc ((van hanh) or (van minh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) nang x hoi. hieu va chat luoc ((van hanh) or (van minh)) di cua triet*.