Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
trong van » trong cac
van nhung » van nhuong, va nhung, van hung
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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