Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
hien xanh » hien hanh, hien nhanh, hien khanh
han huong » han thuong, han phuong, ban huong
anh tang » anh bang, anh dang, anh nang
luan han » luan hoan, luan phan, luan van
dan chan » dan gian, dan ca, van chat
chan tap » han tap, phan tap, chan ta

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) OR (chieu xanh)) - ((anh tang) or (hanh trinh)) luan han huong dan chan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu xanh)) - ((anh tang) OR (hanh trinh)) luan han huong dan chan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (chieu xanh)) - ((anh tang) or (hanh trinh)) luan han huong dan chan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (chieu xanh)) - ((anh tang) or (hanh trinh)) luan han huong dan chan tap*.