Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
tinh trang » minh trang, tinh quang, tinh toan
khong cong » khong cang, chong cong, khong con
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan

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 - ((tinh trang) or (canh tranh)) hoa ((khong cong) OR (thong cong)) ban thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((tinh trang) OR (canh tranh)) hoa ((khong cong) OR (thong cong)) ban thanh van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - ((tinh trang) or (canh tranh)) hoa ((khong cong) OR (thong cong)) ban thanh van".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((tinh trang) or (canh tranh)) hoa ((khong cong) OR (thong cong)) ban thanh van*.