Perhaps you should try some spelling variations:
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
hang hai » hoang hai, hang tai, thanh hai
dang hai » dang khai, dung hai, dong hai
cham buc » cham soc, pham duc, cham cuu
so sach » so sanh, bo sach, co sach
ly hang » ly quang
ma hoi » mai hoi, xa hoi, ma hoa
buc xa » tuc xa

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 ((ty xang) or (ly hang)) ma hoi. hieu van cham buc xa ((dang hai) or (hang hai)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty xang) OR (ly hang)) ma hoi. hieu van cham buc xa ((dang hai) OR (hang hai)) cua vat.
• Adding a wildcard symbol may retrieve word variants: so sach ((ty xang) or (ly hang)) ma hoi. hieu van cham buc xa ((dang hai) or (hang hai)) cua vat*.