Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
dong phan » dung phan, cong phan, dong chan
phan cong » thanh cong
dang hanh » dang thanh, ban hanh, dang van
anh dong » anh huong, anh son
dung dan » dung dat, dung san, tung dan
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 - anh dong phan cong ((dang hanh) or (dung dan)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu hach - anh dong phan cong ((dang hanh) OR (dung dan)) phan lap.
• Adding a wildcard symbol may retrieve word variants: toc thieu hach - anh dong phan cong ((dang hanh) or (dung dan)) phan lap*.