Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
dung dat » dung va, dung tai
hieu van » hieu va, thien van, lieu va
van chat » cao chat
va dung » van dung, va duong, vat dung
cua tre » cua te, cua triet, dua tren
truc va » thuc va, thuc vat, trung va
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo
sac ky » sai ky

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

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