Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tien manh » tien thanh, tieng anh, tran manh
thanh van » thanh san, thanh toan, thanh phan
tien anh » tieng anh, dien anh, tien thanh
tranh va » tranh van, trang va, trinh va
cong tan » cong tac, cong san, cong thanh
tan chan » dan chan, ban chan, can chan
chan cau » phan cau, can cau, chinh cau

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) or (tien manh)) - canh ((tranh va) or (thanh van)) thong cong tan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (tien manh)) - canh ((tranh va) OR (thanh van)) thong cong tan chan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (tien manh)) - canh ((tranh va) or (thanh van)) thong cong tan chan cau*.