Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
thong cong » trong cong, tong cong, thong thong
hoc thien » hoc hien, hoc thieu, hoc thiet
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
doan phan » doanh phan, toan phan, dan 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 thien hach - thanh trung cua ((thong cong) or (hang cong)) doan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh trung cua ((thong cong) OR (hang cong)) doan phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh trung cua ((thong cong) or (hang cong)) doan phan tu*.