Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh quan
khong cong » thong cong, khong cang, chong cong
cua khong » hua khong, cua phuong, cua thuong
tieu sach » chieu sach, dien sach, te sach
trinh han » trinh quan
anh mang » hanh mang, anh dang, anh nang
anh bang » anh hoang, anh quang, tinh bang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((anh mang) or (anh bang)) cua khong cong ((trinh toan) OR (trinh han)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((anh mang) OR (anh bang)) cua khong cong ((trinh toan) OR (trinh han)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((anh mang) or (anh bang)) cua khong cong ((trinh toan) OR (trinh han)) cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((anh mang) or (anh bang)) cua khong cong ((trinh toan) OR (trinh han)) cau*.