Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
manh trung » manh tung, thanh trung, manh hung
thong cong » trong cong, tong cong, thong thong
hien sach » dien sach, kien sach, chieu sach
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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) or (thien hach)) - manh trung cua thong cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (thien hach)) - manh trung cua thong cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) or (thien hach)) - manh trung cua thong cong dan toan tap*.