Perhaps you should try some spelling variations:
theo chua » theo chu, ho chua, cheo cua
chua xang » chua nang, chuc nang, chu bang
cong cong » cong dong, trong cong, dung cong
sinh cua » manh cua, dinh cuu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban
sinh va » sinh vat, tinh va, dinh van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chua xang - hanh ((sinh cua) OR (sinh va)) cong cong tac toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chua xang - hanh ((sinh cua) OR (sinh va)) cong cong tac toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chua xang - hanh ((sinh cua) OR (sinh va)) cong cong tac toan tap*.