Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va
xuc ban » duc ban, cuc ban, quoc ban
tai du » tai tu, tri du, tai su
du tre » duc tre, du tru, dua tren
sac ky » cac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sai ky)) nang cao hoc. ((hieu ve) OR (hieu van)) cam xuc ban thanh tai du tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) nang cao hoc. ((hieu ve) OR (hieu van)) cam xuc ban thanh tai du tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sai ky)) nang cao hoc. ((hieu ve) OR (hieu van)) cam xuc ban thanh tai du tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sai ky)) nang cao hoc. ((hieu ve) OR (hieu van)) cam xuc ban thanh tai du tre*.