Perhaps you should try some spelling variations:
thien tinh » khien tinh, tien tinh, trien tinh
thien minh » tien minh, trien minh, thien chinh
thanh tung » thanh cong
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban
tung su » dung su, rung su, tang su

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 tinh) or (thien minh)) - thanh tung su dung cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien tinh) OR (thien minh)) - thanh tung su dung cong tan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thien tinh) or (thien minh)) - thanh tung su dung cong tan ((toan cao) or (toan ban))*.