Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luat nhung » luat chung, thuat nhung, cua nhung
hiem ngan » kim ngan, viem gan
cong tinh » cong trinh, cong vinh, long tinh
doc hiem » doc hieu, hoc hien, doc viet
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hiem ngan - hanh trinh ((luat nhung) OR (luat thuong)) cong tinh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hiem ngan - hanh trinh ((luat nhung) OR (luat thuong)) cong tinh ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hiem ngan - hanh trinh ((luat nhung) OR (luat thuong)) cong tinh ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doc hiem ngan - hanh trinh ((luat nhung) OR (luat thuong)) cong tinh ((toan cau) or (toan ban))*.