Perhaps you should try some spelling variations:
tran trong » gian trong, quan trong, tran hong
hanh trong » hanh trang, anh trong, hinh trong
lieu tinh » trieu tinh, diep tinh, bien tinh
trong bai » trong ban, thong bai, trong hai
doi lieu » duoc lieu, doi chieu, du lieu
tap tap » tap tai, lap tap, tap lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi lieu tinh - ((hanh trong) or (tran trong)) su dung trong bai tap tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi lieu tinh - ((hanh trong) OR (tran trong)) su dung trong bai tap tap.
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - ((hanh trong) or (tran trong)) su dung trong bai tap tap*.