Perhaps you should try some spelling variations:
hoc thieu » hoc hien
hanh dong » anh dong, ha dong
dong phan » dung phan, cong phan, dong chan
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
cong van » cong vang, cong san, song van
ban tap » bai tap, han tap, ban tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (hoc thieu)) tach - hanh dong phan dung cong van ban tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (hoc thieu)) tach - hanh dong phan dung cong van ban tap.
• Adding a wildcard symbol may retrieve word variants: ((toc thieu) or (hoc thieu)) tach - hanh dong phan dung cong van ban tap*.