Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
hien sach » dien sach, kien sach, chieu sach
chan dung » dan dung
van dung » van dong, xay dung, tin dung
cong san » cong tac
san khan » san khau, san khac, san phan
khan ap » khan cap, han ap, khan dam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sach) OR (thien hach)) - thanh trung ((chan dung) or (van dung)) cong san khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sach) OR (thien hach)) - thanh trung ((chan dung) OR (van dung)) cong san khan ap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sach) OR (thien hach)) - thanh trung ((chan dung) or (van dung)) cong san khan ap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sach) OR (thien hach)) - thanh trung ((chan dung) or (van dung)) cong san khan ap*.