Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
tong thong » thong thong, dong thong, cong thong
lanh manh » lanh tranh, lan anh, van manh
manh toan » thanh toan, anh tuan, tinh toan
manh cua » doanh cua, ban cua
cua tong » cua cong, cua dong, cua nong
van toan » van tuan, van tan, van thanh

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)) - lanh manh cua tong thong ((van toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - lanh manh cua tong thong ((van toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - lanh manh cua tong thong ((van toan) or (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - lanh manh cua tong thong ((van toan) or (manh toan)) cau*.