Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tap toan » tap doan, tap quan, bai toan

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 - hanh tranh cua nhung cong ((tap toan) or (tan tran)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh tranh cua nhung cong ((tap toan) OR (tan tran)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh tranh cua nhung cong ((tap toan) or (tan tran)) cau*.