Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc chinh » hoan chinh, hoc sinh, hoc kinh
ho chinh » cho chinh, hoa chinh, do chinh
ha nhung » hoa nhung, hay nhung, pha nhung
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: ((ho chinh) OR (hoc chinh)) sach - ((thanh trung) or (thanh tung)) ha nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (hoc chinh)) sach - ((thanh trung) OR (thanh tung)) ha nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chinh) OR (hoc chinh)) sach - ((thanh trung) or (thanh tung)) ha nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) OR (hoc chinh)) sach - ((thanh trung) or (thanh tung)) ha nhung cong san toan cao*.