Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
phan cac » nhan cach, phan dau, phan lap

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