Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cong » khong cang, chong cong, khong con
thong cong » trong cong, tong cong, thong thong
mot chieu » doi chieu
trung cua » truong cua, trung tuan, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
dan phan » doan phan, dan chan, 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: ((ho chieu) or (mot chieu)) xanh - thanh trung cua ((khong cong) OR (thong cong)) dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) xanh - thanh trung cua ((khong cong) OR (thong cong)) dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (mot chieu)) xanh - thanh trung cua ((khong cong) OR (thong cong)) dan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) xanh - thanh trung cua ((khong cong) OR (thong cong)) dan phan tu*.