Perhaps you should try some spelling variations:
tranh khong » trinh khong, tran hong, tranh hang
khong xuong » khong dung, hong vuong, thong duong
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
chat ban » nhat ban, chat ran, cua ban
con ban » con bang, co ban, can ban
co dan » co ban, ca dan, cao dang

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 - canh tranh khong xuong ((con ban) or (co dan)) chat ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - canh tranh khong xuong ((con ban) OR (co dan)) chat ban.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh tranh khong xuong ((con ban) or (co dan)) chat ban*.