Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
cong thanh » dong thanh, cong trinh, cong tan
duong manh » duong van
hoc thieu » toc thieu, hoc hien
cong manh » cong danh, hoang manh, cong khanh
trung va » truong va, trang va, trung ha
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 - thanh trung va nhung ((((cong manh) OR (cong thanh))) or (duong manh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung va nhung ((((cong manh) OR (cong thanh))) OR (duong manh)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh trung va nhung ((((cong manh) OR (cong thanh))) or (duong manh)) toan cao*".