Perhaps you should try some spelling variations:
trong dan » trong dang, trong san, trong tan
khi xanh » khia canh, thi hanh, thi oanh
trang va » hang va
tran van » luan van
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
thi anh » thi hanh, thi thanh, thich anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((khi xanh) or (thi anh)) - thanh ((trang va) OR (tran van)) dung trong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((khi xanh) OR (thi anh)) - thanh ((trang va) OR (tran van)) dung trong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((khi xanh) or (thi anh)) - thanh ((trang va) OR (tran van)) dung trong dan than cao".
• Adding a wildcard symbol may retrieve word variants: doi ((khi xanh) or (thi anh)) - thanh ((trang va) OR (tran van)) dung trong dan than cao*.