Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
hanh trung » thanh trung, hanh trang, manh trung
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
tien anh » tieng anh, tien manh, dien anh
cong tam » cong tac, cong tan, cong nam
tam than » ban than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien chanh) or (tien anh)) - hanh trung cua thong cong tam than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (tien anh)) - hanh trung cua thong cong tam than tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien chanh) or (tien anh)) - hanh trung cua thong cong tam than tap*.