Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thong cong » trong cong, tong cong, thong thong
quan thanh » ban thanh, van thanh
cong quan » cuong quan, cong quang, tong quan
thanh cao » thanh ca, thanh cac, thanh thao
trung va » truong va, trang va, trung ha
tung va » tuong va, dung va, vung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - thanh ((tung va) OR (trung va)) thong cong quan thanh cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - thanh ((tung va) OR (trung va)) thong cong quan thanh cao".
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh ((tung va) OR (trung va)) thong cong quan thanh cao*.