Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
nang xa » lang xa, nang ma, mang xa
cuu tre » cua tre, cau tren, cau treo
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
thu va » thuc va, thue va, tu va

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

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