Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
trung phan » trung thanh, trung ha, dung phan
phan xuong » phan cong
xuong cong » luong cong, duong cong, cuong cong
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
cong toan » cong tan, cong hoan, cong tuan
phan tap » phan lap, han tap, phan tu
pha tap » pham tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (hoc thieu)) tach - hanh trung phan xuong cong toan ((phan tap) OR (pha tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) tach - hanh trung phan xuong cong toan ((phan tap) OR (pha tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc thieu)) tach - hanh trung phan xuong cong toan ((phan tap) OR (pha tap))".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc thieu)) tach - hanh trung phan xuong cong toan ((phan tap) OR (pha tap))*.