Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
hanh trang » thanh trung, canh tranh, hanh trinh
trung cong » truong cong, trong cong, trung uong
hien danh » thien danh, hien hanh, hien nhanh
cua trung » cua truong, xuan trung, cua nhung
cong tan » cong tac, cong san, cong thanh

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 danh - ((lanh tranh) or (hanh trang)) cua trung cong tan ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien danh - ((lanh tranh) OR (hanh trang)) cua trung cong tan ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien danh - ((lanh tranh) or (hanh trang)) cua trung cong tan ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien danh - ((lanh tranh) or (hanh trang)) cua trung cong tan ((toan ban) OR (van ban))*.