Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh nhan » thanh nhan, danh nhan, anh nhan
dong cong » duong cong, dung cong, dang cong
hanh han » hanh phan, hanh san, anh han
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap
ca dong » cao dong, cau dong, cua dong

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) or (chieu sang)) - ((hanh han) OR (hanh nhan)) ca dong cong dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (chieu sang)) - ((hanh han) OR (hanh nhan)) ca dong cong dan phan cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) or (chieu sang)) - ((hanh han) OR (hanh nhan)) ca dong cong dan phan cac*".