Perhaps you should try some spelling variations:
thong cong » trong cong, thong thong, phong chong
kieu tinh » lieu tinh, trieu tinh, diep tinh
chau tinh » cuu tinh, ha tinh, cua tinh
hanh dung » thanh dung, anh dung, hanh dong
tong cong » trong cong, cong cong, dung cong
dung cua » dung luan, dung cho
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((kieu tinh) or (chau tinh)) - hanh dung cua ((thong cong) or (tong cong)) tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((kieu tinh) OR (chau tinh)) - hanh dung cua ((thong cong) OR (tong cong)) tap toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((kieu tinh) or (chau tinh)) - hanh dung cua ((thong cong) or (tong cong)) tap toan cao*.