Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, phong chong
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
toan cao » toan ban, toan tap
tao cao » bao cao

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 cua ((thong cong) or (thong thong)) van ((toan cao) or (tao cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trang cua ((thong cong) OR (thong thong)) van ((toan cao) OR (tao cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trang cua ((thong cong) or (thong thong)) van ((toan cao) or (tao cao))*.