Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
van hanh » van thanh, ban hanh, van anh
nganh ky » nganh y, nganh xay, hanh ky
hieu van » hieu va, thien van, lieu va
su triet » su viet, su tien, ve triet
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va danh » va dinh, va dan, va hanh
van cac » van hac, van cau, van bac
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nganh ky ((nang xa) or (nang ma)) hoi. hieu van cac du ((van hanh) or (va danh)) vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh ky ((nang xa) OR (nang ma)) hoi. hieu van cac du ((van hanh) OR (va danh)) vi su triet.
• Adding a wildcard symbol may retrieve word variants: hoc nganh ky ((nang xa) or (nang ma)) hoi. hieu van cac du ((van hanh) or (va danh)) vi su triet*.