Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hien hanh » dieu hanh
hanh manh » hanh mang, lanh manh, hoang manh
dang cong » dung cong
dan khanh » dang khanh, van khanh, dat khanh
manh cua » doanh cua, ban cua
cua dang » cua cong, cua ban
dan hanh » dang hanh, dan thanh, ban hanh

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 (hien hanh)) - hanh manh cua dang cong ((dan hanh) or (dan khanh)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - hanh manh cua dang cong ((dan hanh) OR (dan khanh)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (hien hanh)) - hanh manh cua dang cong ((dan hanh) or (dan khanh)) tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (hien hanh)) - hanh manh cua dang cong ((dan hanh) or (dan khanh)) tu*.