Perhaps you should try some spelling variations:
bang hanh » bang thanh, ban hanh, bang hinh
su triet » su viet, su tien
van tham » van thanh, van tuan, van chat
ve triet » va trien
hanh vai » hanh vi, hanh va, hanh tai
luu bang » huu bang, luu hoang, luu quang
tham luu » tam luu, thanh luu, cham cuu
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu van tham luu bang hanh vai ((ve triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu van tham luu bang hanh vai ((ve triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((nang xa) OR (nang ma)) hoi. hieu van tham luu bang hanh vai ((ve triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((nang xa) OR (nang ma)) hoi. hieu van tham luu bang hanh vai ((ve triet) or (su triet))*.