Perhaps you should try some spelling variations:
truong cua » truong ca, truong quan, truong cao
khong cong » thong cong, khong cang, chong cong
hiem ngan » kim ngan, viem gan
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » trung tuan, trung cap, dung cua
cong dan » cong san, cong tan, huong 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 (hieu manh)) - thanh ((trung cua) OR (truong cua)) khong cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hiem ngan) OR (hieu manh)) - thanh ((trung cua) OR (truong cua)) khong cong dan chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hiem ngan) or (hieu manh)) - thanh ((trung cua) OR (truong cua)) khong cong dan chan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hiem ngan) or (hieu manh)) - thanh ((trung cua) OR (truong cua)) khong cong dan chan cau*.