Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
bac nganh » cac nganh, bac ninh, hoc nganh
sach bac » sach bai, sach dao, sach xa
danh gia » dan gian
su sach » so sach, vu sach
qua ban » cua ban, qua quan
cuu tre » cua tre, cau tren, cau treo
luc van » luoc van, luu van, duc van
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
y hoi » ky hoi, y hoc, o hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach bac nganh y hoi. hieu ve cac ((luc van) or (qua ban)) ((thanh gian) or (danh gia)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach bac nganh y hoi. hieu ve cac ((luc van) OR (qua ban)) ((thanh gian) OR (danh gia)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach bac nganh y hoi. hieu ve cac ((luc van) or (qua ban)) ((thanh gian) or (danh gia)) cuu tre*.