Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
mot chieu » ho chieu
doi chieu » doc hieu, ho chieu, thi chieu
dai thong » dai tuong, dai hong, dai thang
tung dai » trung dai, tuong dai, tung dan
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (((doi chieu) OR (doi chi)))) sach - thanh tung dai thong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (((doi chieu) OR (doi chi)))) sach - thanh tung dai thong cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (((doi chieu) OR (doi chi)))) sach - thanh tung dai thong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (((doi chieu) OR (doi chi)))) sach - thanh tung dai thong cong tan toan cao*.