Perhaps you should try some spelling variations:
thanh chung » thanh chuong, thanh hung, thanh phuong
chung chuan » chung khoan, chung cua, chung nhan
thieu sach » chieu sach, thien hach, hieu cach
chuan dong » chua dong, chuan long, chuyen dong
hoc thieu » toc thieu, hoc hien
dong cong » duong cong, dung cong, dang cong
van quang » van quan, tran quang, van tuan
van nang » van ban, van dong, van dung

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 chung chuan dong cong ((van nang) OR (van quang)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh chung chuan dong cong ((van nang) OR (van quang)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh chung chuan dong cong ((van nang) OR (van quang)) cao*.