Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
thieu anh » thien anh, chieu xanh, thien danh
cong manh » cong danh, duong manh, cong thanh
trung va » truong va, trang va, trung ha

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 anh) or (thien thanh)) - thanh trung va nhung cong manh ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu anh) OR (thien thanh)) - thanh trung va nhung cong manh ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu anh) or (thien thanh)) - thanh trung va nhung cong manh ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu anh) or (thien thanh)) - thanh trung va nhung cong manh ((toan ban) OR (van ban))*.