Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung chuc » trung thuc, trung thuoc, truong thuc
thien anh » thien danh, thien thanh, thien chanh
nang cong » nang song, dang cong, bang cong
tien anh » tieng anh, tien manh, dien anh
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien anh) OR (tien anh)) - thanh trung chuc nang cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) OR (tien anh)) - thanh trung chuc nang cong tan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) OR (tien anh)) - thanh trung chuc nang cong tan than cau*.