Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
phan xuong » phan cong
manh dung » manh hung, manh tung, anh dung
dung phan » dung nhan, dung luan, dung ha
dang hanh » dang thanh, ban hanh, dang van
dung dat » dung va, dung tai
phan lap » phan dau

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 hach - manh dung phan xuong ((dang hanh) or (dung dat)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hach - manh dung phan xuong ((dang hanh) OR (dung dat)) phan lap.
• Adding a wildcard symbol may retrieve word variants: toc thieu hach - manh dung phan xuong ((dang hanh) or (dung dat)) phan lap*.