Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh hang » thanh hang, hang hang, hanh han
va phuong » va thuong, cac phuong
ho chieu » theo chieu, doi chieu, mot chieu
va thong » va thuong, he thong, va cong
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - hanh hang ((va thong) OR (va phuong)) cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - hanh hang ((va thong) OR (va phuong)) cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - hanh hang ((va thong) OR (va phuong)) cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - hanh hang ((va thong) OR (va phuong)) cong dan van ban*.