Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
nhan minh » nhan sinh, nhat minh, phan minh
minh vat » sinh vat, minh va, dinh vat
dung cac » luong cac, dung cho, dung tai
cac cau » cac mau, bac cau, ca 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 hien xanh - nhan minh vat ((nhung cong) OR (thong cong)) dung cac cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - nhan minh vat ((nhung cong) OR (thong cong)) dung cac cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - nhan minh vat ((nhung cong) OR (thong cong)) dung cac cau*.