Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
cham luc » cham soc, nhan luc, cham cuu
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va danh » va dinh, va dan, va hanh
cai ky » cao ky, cac ky, cam ky
di cua » dai cua, doi cua, de cua
tu cai » tu cac, tu can, tu bai

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

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