Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
manh trung » manh tung, thanh trung, manh hung
thong cong » trong cong, thong thong, phong chong
tong cong » trong cong, cong cong, dung cong
trung ca » trung cap, truong ca, trung cua
tran cau » tran chau, toan cau, ran cau

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

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