Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
cao hoc » co hoc, cho hoc, chat hoc
va cham » va chat, va tham
xuc ban » duc ban, cuc ban, quoc ban
cuc tre » duc tre, cua tre, cuu tre
sac ky » sai ky
ve cac » va cac, vien cac

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