Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien sach » dien sach, kien sach, thien hach
cua nhung » va nhung
canh van » can van, cach van, canh dan
cong san » cong tac
san tran » tan tran, ban tran, dang tran
tran cao » toan cao, tran chau, trang cho
anh van » anh va, thanh van, doanh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - ((canh van) OR (anh van)) cua nhung cong san tran cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien sach - ((canh van) OR (anh van)) cua nhung cong san tran cao*".