Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
manh toan » thanh toan, tinh toan
trang va » tran van, hang va
dan toan » van toan, dan than, xuan 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 trang va nhung cong ((dan toan) or (((manh toan) OR (anh tuan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trang va nhung cong ((dan toan) OR (((manh toan) OR (anh tuan)))) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trang va nhung cong ((dan toan) or (((manh toan) OR (anh tuan)))) cao*".