Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
han huong » han thuong, han phuong, ban huong
anh tang » anh bang, anh dang, anh nang
luan han » luan hoan, luan phan, luan van
chan tap » han tap, phan tap, toan tap
chan ta » chan tha, nhan tai, nhan tao

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 - ((anh tang) or (hanh trinh)) luan han huong dan ((chan tap) OR (chan ta))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((anh tang) OR (hanh trinh)) luan han huong dan ((chan tap) OR (chan ta))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((anh tang) or (hanh trinh)) luan han huong dan ((chan tap) OR (chan ta))*".