Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trong dang » truong dang, trong dong, trong dung
nang thuc » dang thuoc, nhanh thuc, trang thuc
thuc dung » thuoc dung, thuy dung, tuc dung
trong dan » trong san, trong tan, trong ban
anh nang » ganh nang, anh bang, anh dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: mot chieu tinh - anh nang thuc dung ((trong dang) or (trong dan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot chieu tinh - anh nang thuc dung ((trong dang) OR (trong dan)) van ban*.