Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
bang cong » dang cong, bang song, hang cong
chinh can » chinh ban, chinh cau, chinh ngan
tung cua » trung cua, tuong cua, dung cua
chinh ca » chinh ta, chinh va, chinh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - thanh tung cua ((nhung cong) or (bang cong)) van ((chinh can) OR (chinh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh tung cua ((nhung cong) OR (bang cong)) van ((chinh can) OR (chinh ca)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - thanh tung cua ((nhung cong) or (bang cong)) van ((chinh can) OR (chinh ca))".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh tung cua ((nhung cong) or (bang cong)) van ((chinh can) OR (chinh ca))*.