Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
thanh trung » thanh tung
cua phuong » cuu phuong, cuc phuong, luan phuong
hoc thiet » hoc thieu, hoc thuyet, toc thieu
trung cua » truong cua, trung tuan, trung cap
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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 hien)) anh - thanh trung cua phuong cong tan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc hien)) anh - thanh trung cua phuong cong tan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc hien)) anh - thanh trung cua phuong cong tan phan tu*.