Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
lanh manh » lanh tranh, lan anh, van manh
chua dong » cua dong, ha dong, huy dong
hoc kien » hoc vien, hoa kien, hoc lien
cua dang » cua cong, cua ban
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 kien) OR (hoc hien)) sach - lanh manh ((cua dang) or (chua dong)) cong thanh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc kien) OR (hoc hien)) sach - lanh manh ((cua dang) OR (chua dong)) cong thanh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc kien) OR (hoc hien)) sach - lanh manh ((cua dang) or (chua dong)) cong thanh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc kien) OR (hoc hien)) sach - lanh manh ((cua dang) or (chua dong)) cong thanh toan cao*.