Perhaps you should try some spelling variations:
thang cong » thanh cong, thang long, thong cong
toan thang » toan thong, thanh thang, tran thanh
cong luong » cong thuong, nang luong, cong dong
thi chieu » thi chien, thi hieu, theo chieu
luong dan » huong dan, luong dao, luong van
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi chieu) or (theo tieu)) sach - tinh toan thang cong luong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo tieu)) sach - tinh toan thang cong luong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo tieu)) sach - tinh toan thang cong luong dan phan tu*.