Perhaps you should try some spelling variations:
tmanh trung » thanh trung, thanh tung, manh tung
manh trung » manh tung, thanh trung, manh hung
hien hanh » dieu hanh
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau
ve dung » ve duong, ve rung, va dung

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 hanh - ((manh trung) or (tmanh trung)) ve dung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((manh trung) OR (tmanh trung)) ve dung cong dan chan cau*.