Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
phan xuong » phan cong
hoc thieu » toc thieu, hoc hien
dung phan » dung nhan, dung luan, dung ha
dang toan » dang tran, dan toan, dang thanh
dung toan » dung doanh, dung thang, dung thanh
anh dung » anh dong, anh huong, sach dung
phan tap » phan lap, han tap, pha tap

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 hach - anh dung phan xuong ((dang toan) OR (dung toan)) phan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu hach - anh dung phan xuong ((dang toan) OR (dung toan)) phan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - anh dung phan xuong ((dang toan) OR (dung toan)) phan tap*.