Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
luat hang » luat hanh, luat chung, luat quang
hang cong » dang cong, hang nong, bang cong
cong tinh » cong trinh, cong vinh, long tinh
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 (hieu manh)) - ((hanh trinh) OR (canh tranh)) luat hang cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hieu manh)) - ((hanh trinh) OR (canh tranh)) luat hang cong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (hieu manh)) - ((hanh trinh) OR (canh tranh)) luat hang cong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (hieu manh)) - ((hanh trinh) OR (canh tranh)) luat hang cong tinh toan cau*.