Perhaps you should try some spelling variations:
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
thi lieu » tai lieu, thi lien, thi dieu
theo yeu » theo tieu, thiet yeu, theo chu
luan han » luan hoan, luan phan, luan van
han cong » phan cong, hang cong, hanh cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi lieu) or (theo yeu)) tinh - ((hanh tang) or (hanh mang)) luan han cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi lieu) OR (theo yeu)) tinh - ((hanh tang) OR (hanh mang)) luan han cong dan than ban.
• Adding a wildcard symbol may retrieve word variants: ((thi lieu) or (theo yeu)) tinh - ((hanh tang) or (hanh mang)) luan han cong dan than ban*.