Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
thang va » hang va, trang va, thanh va
thong va » thong cua, truong va, thong qua
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: theo ((toc sach) OR (doc sach)) - anh ((thang va) or (thong va)) nhung cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((toc sach) OR (doc sach)) - anh ((thang va) OR (thong va)) nhung cong van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((toc sach) OR (doc sach)) - anh ((thang va) or (thong va)) nhung cong van toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((toc sach) OR (doc sach)) - anh ((thang va) or (thong va)) nhung cong van toan cao*.