Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
nganh ky » nganh y, nganh xay, hanh ky
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
van hac » van hoc, van ha, van hai
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
vi cuu » vi luu, vinh cuu
hac du » cac du, han du, hac de

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 (lang xa)) hoi. hieu van hac du ((van hanh) or (va danh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nganh ky ((nang xa) OR (lang xa)) hoi. hieu van hac du ((van hanh) OR (va danh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nganh ky ((nang xa) OR (lang xa)) hoi. hieu van hac du ((van hanh) or (va danh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: hoc nganh ky ((nang xa) OR (lang xa)) hoi. hieu van hac du ((van hanh) or (va danh)) vi cuu tre*.