Perhaps you should try some spelling variations:
thanh tung » thanh cong
trinh toan » tinh toan, thanh toan, trinh quan
bao tuong » ban tuong, bao duong, bao trong
trinh han » trinh quan
chi sach » chinh sach, chieu sach, co sach
ba tuong » ban tuong, va tuong, sa tuong
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: doi chi sach - thanh tung ((ba tuong) OR (bao tuong)) cong ((trinh toan) or (trinh han)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - thanh tung ((ba tuong) OR (bao tuong)) cong ((trinh toan) OR (trinh han)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - thanh tung ((ba tuong) OR (bao tuong)) cong ((trinh toan) or (trinh han)) cao*".