Perhaps you should try some spelling variations:
tinh trang » minh trang, tinh quang, tinh toan
trang thuc » trang phuc, trong thuc, tran thuy
cong chan » cong nhan, cong chat, cong khan
doc hieu » hoc thieu, hoc hien
thuc dan » thuc hanh, hoc dan, thuc vat
dan cong » dang cong, van cong, dan dong
chan dan » chan doan, chan dang, nhan dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) sang - tinh trang thuc dan cong chan dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) sang - tinh trang thuc dan cong chan dan ca*.