Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
chung cong » nhung cong, chong cong, chung thong
phung cong » nhung cong, phong cong, nhung chong
hoc thieu » toc thieu, hoc hien
ban than » ban thanh, van thanh, ban hang

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 trinh luat ((chung cong) or (phung cong)) ((tinh toan) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh luat ((chung cong) OR (phung cong)) ((tinh toan) OR (ban than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh luat ((chung cong) or (phung cong)) ((tinh toan) or (ban than)) cau*.