Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
hoc thieu » toc thieu, hoc hien
dap dung » ap dung, dap ung, cap dung
dan dung » van dung, tin dung, ap dung
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 trung ((dap dung) or (dan dung)) huong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trung ((dap dung) OR (dan dung)) huong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trung ((dap dung) or (dan dung)) huong dan toan cau*.