Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
cong tuan » cong tan, cong luan, cong thanh
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
thanh cac » hanh cac, thanh bac, thanh ca
phan cau » phan dau, phan cac, phan tu

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 cong tuan ((bang cong) OR (dang cong)) dan ((phan cau) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh cong tuan ((bang cong) OR (dang cong)) dan ((phan cau) OR (thanh cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - thanh cong tuan ((bang cong) OR (dang cong)) dan ((phan cau) or (thanh cac))*".