Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
tranh han » tranh hang, trinh han, tranh ban
han thanh » phan thanh, hoan thanh, huan thanh
long doan » cong doan, dong doanh, rong doanh
khoan cam » khoa cam, khoan va, phan cam
hoc hieu » hoc hien, doc hieu, hoc dieu
cong dan » cong san, cong tan, huong dan

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) OR (hoc thieu)) manh - canh tranh han thanh ((cong dan) or (long doan)) khoan cam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) manh - canh tranh han thanh ((cong dan) OR (long doan)) khoan cam.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) manh - canh tranh han thanh ((cong dan) or (long doan)) khoan cam".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) manh - canh tranh han thanh ((cong dan) or (long doan)) khoan cam*.