Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoa thien » hoan thien, hoa thiet, hoa hien
ban dung » van dung, tan dung, lan dung
dan dung » van dung, tin dung, ap dung
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai 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: hoa thien hach - hanh chinh ((ban dung) or (dan dung)) cong tap toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoa thien hach - hanh chinh ((ban dung) OR (dan dung)) cong tap toan tap.
• Adding a wildcard symbol may retrieve word variants: hoa thien hach - hanh chinh ((ban dung) or (dan dung)) cong tap toan tap*.