Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, hieu cach
chieu xanh » chieu tinh, hieu manh
chieu sang » hieu lang, nhieu tang
hanh trang » thanh trung, canh tranh, hanh trinh
trang tuan » tran tuan, trung tuan, trong tuan
tuan nhung » quan nhung, tuan hung, thuat nhung
nhung cong » dung cong, thong cong, hang cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap

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 xanh) OR (chieu sang)))) - hanh trang tuan nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (((chieu xanh) OR (chieu sang)))) - hanh trang tuan nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (((chieu xanh) OR (chieu sang)))) - hanh trang tuan nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (((chieu xanh) OR (chieu sang)))) - hanh trang tuan nhung cong tac toan cau*.