Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
thanh toan » thanh hoa, thanh san, tinh toan
hanh mang » nhanh mang, hanh trang, nhanh lang
chua nang » chuc nang, kha nang, cuu nang
chua xang » chuc nang, chu bang, chua dong
son thanh » ban thanh, van thanh
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 ((thieu sach) OR (chieu sach)) - hanh mang ((chua nang) or (chua xang)) son thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - hanh mang ((chua nang) OR (chua xang)) son thanh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - hanh mang ((chua nang) or (chua xang)) son thanh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - hanh mang ((chua nang) or (chua xang)) son thanh toan cau*.