Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhanh lang » nhanh quang, nhanh thang, nhan dang
nhung cong » dung cong, thong cong, nhung don
hang cong » dang cong, hang nong, bang cong
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
lang va » lang van, hang va, lang ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - nhanh lang va ((nhung cong) OR (hang cong)) dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - nhanh lang va ((nhung cong) OR (hang cong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - nhanh lang va ((nhung cong) OR (hang cong)) dan toan cao*.