Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hoc thieu » toc thieu, hoc hien
cua bang » chua bang, cua ban, cua dang
san cau » van cau, ban cau, can cau

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 - ((hanh trinh) or (thanh cong)) cua bang ((cong thanh) OR (dong thanh)) san cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((hanh trinh) OR (thanh cong)) cua bang ((cong thanh) OR (dong thanh)) san cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - ((hanh trinh) or (thanh cong)) cua bang ((cong thanh) OR (dong thanh)) san cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((hanh trinh) or (thanh cong)) cua bang ((cong thanh) OR (dong thanh)) san cau*.