Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc hien, doc hieu, hoc dieu
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) cach - thanh trung cua ((hang cong) OR (han tong)) dan chan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) cach - thanh trung cua ((hang cong) or (han tong)) dan chan cau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) cach - thanh trung cua ((hang cong) or (han tong)) dan chan cau*.