Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh te » hanh tu, hanh ve, hanh de
duc ban » duc tan, duc van, dua ban
cuc ban » cua ban, cac ban, cuu ban
sach ky » sach y, sach ty, sach kem
hieu ve » hieu va, hieu van
sac ky » cac ky, sai ky
te cua » tue cua, le cua, de cua
ve cam » ve cham, ve cac, va cam
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 (sac ky)) nang x hoi. hieu ve cam ((cuc ban) or (duc ban)) hanh te cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang x hoi. hieu ve cam ((cuc ban) OR (duc ban)) hanh te cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) nang x hoi. hieu ve cam ((cuc ban) or (duc ban)) hanh te cua triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) nang x hoi. hieu ve cam ((cuc ban) or (duc ban)) hanh te cua triet*.