Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
thanh long » thanh cong, thang long, thanh huong
dan khoan » dan khoa, dai khoang, toan khoan
khoan cam » khoa cam, khoan va, phan cam
tranh ha » thanh ha, trang ha, trinh ha
ha thanh » va thanh, pham thanh, phan thanh
long dan » long doan, cong dan, nong 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 ((hien nhanh) OR (thien thanh)) - canh tranh ha thanh long dan khoan cam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (thien thanh)) - canh tranh ha thanh long dan khoan cam".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (thien thanh)) - canh tranh ha thanh long dan khoan cam*.