Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
cong xuat » cong suat, cong xua, cong cua
xuat phan » thuat phan, xuat nhap, luan phan
he trong » he thong, le trong, ke trong
he trung » le trung, he thong, do trung

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu tinh - canh tranh ((he trong) OR (he trung)) cong xuat phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu tinh - canh tranh ((he trong) OR (he trung)) cong xuat phan tu".
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - canh tranh ((he trong) OR (he trung)) cong xuat phan tu*.