Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu nganh » vien nganh, hieu manh, nghiep nganh
luat nhung » luat chung, luat thuong, thuat nhung
hiem ngan » kim ngan, viem gan
cong tinh » cong trinh, cong vinh, cong thanh
long tinh » trong tinh, luong tin, dong tin
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 ((hieu nganh) or (hiem ngan)) - hanh trinh luat nhung ((cong tinh) OR (long tinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hiem ngan)) - hanh trinh luat nhung ((cong tinh) OR (long tinh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (hiem ngan)) - hanh trinh luat nhung ((cong tinh) OR (long tinh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (hiem ngan)) - hanh trinh luat nhung ((cong tinh) OR (long tinh)) toan cau*.