Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
tung cua » trung cua, tuong cua, dung cua
chan cao » chan cho, chay cao, toan cao
chat cao » chat co, chat cho, chat bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - thanh tung cua ((nhung cong) or (bang cong)) dan ((chan cao) OR (chat cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh tung cua ((nhung cong) OR (bang cong)) dan ((chan cao) OR (chat cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh tung cua ((nhung cong) or (bang cong)) dan ((chan cao) OR (chat cao))*".