Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
thuc chung » thuc cung, thuc nhung, thung chung
cong thanh » dong thanh, cong trinh, cong tan
thieu anh » thien anh, chieu xanh, thien danh
thuc dung » thuoc dung, thuy dung, tuc dung
thanh cha » thanh ha, thanh nha, thanh phan
cha cac » cho cac, cua cac, ca cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu anh) or (chieu tinh)) - tinh toan ((thuc dung) or (thuc chung)) cong thanh cha cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu anh) OR (chieu tinh)) - tinh toan ((thuc dung) OR (thuc chung)) cong thanh cha cac.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu anh) or (chieu tinh)) - tinh toan ((thuc dung) or (thuc chung)) cong thanh cha cac*.