Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh tung » thanh cong
hiem ngan » kim ngan, viem gan
dung cong » dung trong
tung cao » nung cao, truong cao, trung cap
cao dung » cao dang, cao dong, cao ung
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu tinh) or (hiem ngan)) - thanh tung cao dung cong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu tinh) OR (hiem ngan)) - thanh tung cao dung cong bai toan cau*.