Perhaps you should try some spelling variations:
thiet thanh » thien thanh, thi thanh, viet thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
nang quan » ban quan, nang suat
hang luan » tang luan, dung luan
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van 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 thiet thanh - anh ((nang quan) or (hang luan)) dung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet thanh - anh ((nang quan) OR (hang luan)) dung cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet thanh - anh ((nang quan) or (hang luan)) dung cong dan than cau*.