Perhaps you should try some spelling variations:
nhung thong » chung thong, nhung chong, nhung phong
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
hanh tranh » canh tranh, hanh trinh, hanh trang
thong quai » thong quan, thong qua, thong quang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
quai toan » quai tan, quang toan, bai toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thiet tach) or (thuat tach)) - hanh tranh cua nhung thong quai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (thuat tach)) - hanh tranh cua nhung thong quai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) or (thuat tach)) - hanh tranh cua nhung thong quai toan ban*.