Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
cong tran » cong tan, cong tuan, cong toan
hanh han » hanh nhan, hanh phan, hanh san
hoan tap » toan tap, hoan tran, khoan tai
han cua » hang cua, nhan cua, than cua
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chieu sang)) - hanh han cua thong cong tran ((hoan tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh han cua thong cong tran ((hoan tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - hanh han cua thong cong tran ((hoan tap) or (han tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - hanh han cua thong cong tran ((hoan tap) or (han tap))*.