Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
hoc thien » hoc hien, hoc thieu, hoc thiet
tung tuan » trung tuan, hung tuan, quang tuan
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
thanh cac » hanh cac, thanh bac, thanh ca
than cau » toan cau, phan cau, than cap

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