Perhaps you should try some spelling variations:
khong thong » thong thong, khong trong, thong thuong
tieu tinh » trieu tinh, tieu trinh, lieu tinh
hanh hang » thanh hang, hang hang, hanh han
cua khong » hua khong, cua phuong, cua thuong
tich toan » tinh toan, tich than, trinh toan
hang cua » mang cua, hang ca, huong cua
tam toan » tap toan, tam than, pham toan

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 tinh - hanh hang cua khong thong ((tich toan) or (tam toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu tinh - hanh hang cua khong thong ((tich toan) OR (tam toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu tinh - hanh hang cua khong thong ((tich toan) or (tam toan)) cau*.