Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien danh » thien anh, thien dang, thien chanh
thanh tung » thanh cong
nang cong » nang song, dang cong, hang cong
bang cong » dang cong, bang song, hang cong
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man
tung va » trung va, tuong va, dung va

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 danh) OR (thien thanh)) - thanh tung va ((nang cong) or (bang cong)) dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien thanh)) - thanh tung va ((nang cong) OR (bang cong)) dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) OR (thien thanh)) - thanh tung va ((nang cong) or (bang cong)) dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) OR (thien thanh)) - thanh tung va ((nang cong) or (bang cong)) dan than ban*.