Perhaps you should try some spelling variations:
hoc thieu » toc thieu
hanh manh » hanh mang, lanh manh, hoang manh
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap
manh su » manh tu, hanh su, manh cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (hoc hien)) manh - hanh manh su dung cong dan ((than cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) manh - hanh manh su dung cong dan ((than cao) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) manh - hanh manh su dung cong dan ((than cao) or (toan cao))*.