Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
tang van » dang van, hoang van, trong van
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
lap ban » lap luan
hanh di » hanh vi, hanh de, hang di
thu sac » thu sach, thu san, thu xac
nang ma » tang ma, sang ma, nang cao
van bac » van ban, van bao, van hac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky ((nang ma) or (tang van)) hoi. hieu van bac lap ban hanh di ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky ((nang ma) OR (tang van)) hoi. hieu van bac lap ban hanh di ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky ((nang ma) or (tang van)) hoi. hieu van bac lap ban hanh di ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: thu sac ky ((nang ma) or (tang van)) hoi. hieu van bac lap ban hanh di ((cua triet) OR (su triet))*.