Perhaps you should try some spelling variations:
hoang hai » hoang thi, hoang van
hieu van » hieu va, thien van, lieu va
hang hai » hang tai, thanh hai, hang va
co sach » bo sach, cuon sach, hoc sach
lam xuc » cam xuc, lam duoc
xuc ban » duc ban, cuc ban, quoc ban
van lam » van nam
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky danh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((ky dang) or (ky nang)) xay hoi. hieu van lam xuc ban ((hang hai) OR (hoang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ky dang) OR (ky nang)) xay hoi. hieu van lam xuc ban ((hang hai) OR (hoang hai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ky dang) or (ky nang)) xay hoi. hieu van lam xuc ban ((hang hai) OR (hoang hai)) cua tre*".