Perhaps you should try some spelling variations:
hanh trong » hanh trang, anh trong, hinh trong
thuc dang » thuoc dang, thuc dung, thu dang
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
thuc dan » thuc hanh, hoc dan, thuc vat
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien anh - hanh trong ((thuc dang) or (thuc dan)) ((cong dan) OR (cong san)) han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien anh - hanh trong ((thuc dang) OR (thuc dan)) ((cong dan) OR (cong san)) han tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tien anh - hanh trong ((thuc dang) or (thuc dan)) ((cong dan) OR (cong san)) han tap".
• Adding a wildcard symbol may retrieve word variants: hoc tien anh - hanh trong ((thuc dang) or (thuc dan)) ((cong dan) OR (cong san)) han tap*.