Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cang » thong cong, hong bang, khong dung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hiem ngan » kim ngan
trung hua » trung ha, trung hoa, trung cua
hua khong » hoa khong, cua khong, hoac khong
cang dan » cong dan, tang dan, canh dan
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hiem ngan) or (viem gan))) or (hieu manh)) - thanh trung hua khong cang dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hiem ngan) OR (viem gan))) OR (hieu manh)) - thanh trung hua khong cang dan chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((hiem ngan) or (viem gan))) or (hieu manh)) - thanh trung hua khong cang dan chan cau*.