Perhaps you should try some spelling variations:
va doanh » van doanh, vay doanh, va danh
ly doanh » ly anh
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
cac tu » cac thu, cach tu, cac du
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sac ky) OR (sach y)) nang x hoi. hieu va cac tu ((va doanh) OR (ly doanh)) van cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sac ky) OR (sach y)) nang x hoi. hieu va cac tu ((va doanh) OR (ly doanh)) van cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sac ky) OR (sach y)) nang x hoi. hieu va cac tu ((va doanh) OR (ly doanh)) van cua tre*.