Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
chieu sach » chinh sach, chiet tach, chieu sang
phuong dan » phuong danh, phuong doan, huong dan
chua xang » chua nang, chuc nang, chu bang
hanh han » hanh nhan, hanh phan, hanh san
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung
han va » hang va, hanh va, nhan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chua xang) or (chieu sach)) - hanh han va dung phuong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chua xang) OR (chieu sach)) - hanh han va dung phuong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chua xang) or (chieu sach)) - hanh han va dung phuong dan toan cau*.