Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
ty toan » ly toan, tap toan, huy toan
le toan » ke toan, le doan, le tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chiet tach) or (hieu lang)) - hanh trung cap thong cong ((ty toan) or (le toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (hieu lang)) - hanh trung cap thong cong ((ty toan) OR (le toan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (hieu lang)) - hanh trung cap thong cong ((ty toan) or (le toan)) cau*.