Perhaps you should try some spelling variations:
hang hai » hoang hai, hang tai, thanh hai
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach vay
ve cac » va cac, vien cac
sach 2 » sach y
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: tu ((sach v) or (sach 2)) nang x hoi. hieu ve cac duc tan ((hang hai) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach 2)) nang x hoi. hieu ve cac duc tan ((hang hai) OR (hang va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) or (sach 2)) nang x hoi. hieu ve cac duc tan ((hang hai) or (hang va)) cua tre*.