Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
hien sach » dien sach, kien sach, thien hach
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong thanh
chan nan » chan nhan, chang nang, chan doan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - hanh trung cua thong ((cong tan) or (huong dan)) chan nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh trung cua thong ((cong tan) OR (huong dan)) chan nan.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - hanh trung cua thong ((cong tan) or (huong dan)) chan nan*.