Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
so nganh » so ngan, hoc nganh, moi nganh
nganh ky » nganh y, nganh xay, hanh ky
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: so nganh ky nang xa hoi. hieu van cac du ((van thanh) or (va danh)) vi ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so nganh ky nang xa hoi. hieu van cac du ((van thanh) OR (va danh)) vi ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so nganh ky nang xa hoi. hieu van cac du ((van thanh) or (va danh)) vi ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: so nganh ky nang xa hoi. hieu van cac du ((van thanh) or (va danh)) vi ((cuu tre) OR (cau treo))*.