Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, hang hai, hanh tai
dang xay » dang van, van xay
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
sach ky » sach y, sach ty, sach kem
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cuu tre, cua triet
sac ky » cac 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: so ((sach ky) OR (sac ky)) dang xay hoi. hieu van cam xuc ban ((hanh hai) or (nhanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sac ky)) dang xay hoi. hieu van cam xuc ban ((hanh hai) OR (nhanh hai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sac ky)) dang xay hoi. hieu van cam xuc ban ((hanh hai) or (nhanh hai)) cua tre*".