Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hanh trung » thanh trung, hanh trang, manh trung
hiem ngan » kim ngan, viem gan
trung cua » truong cua, trung tuan, trung cap
cua trong » cua truong, cua trung, qua trong
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (hiem ngan)) - hanh trung cua trong cong thanh ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (hiem ngan)) - hanh trung cua trong cong thanh ((phan dau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (hiem ngan)) - hanh trung cua trong cong thanh ((phan dau) or (phan cac))*.