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