Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
hien nhanh » hien hanh, thien thanh, tien thanh
tranh tran » thanh tran, tranh toan, tranh tren
trong dan » trong dang, trong san, trong tan
toan cao » toan ban, toan tap
chan cho » chat cho, han cho, chuan chon

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien nhanh - canh tranh tran quang trong dan ((toan cao) or (chan cho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - canh tranh tran quang trong dan ((toan cao) OR (chan cho)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - canh tranh tran quang trong dan ((toan cao) or (chan cho))*.