Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh nhan » thanh nhan, danh nhan, anh nhan
va thong » va thuong, va phuong, he thong
ban toan » ban than, van toan, bao toan
bai toan » bai tap
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu xanh - hanh nhan va thong cong ((ban toan) OR (bai toan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh nhan va thong cong ((ban toan) OR (bai toan)) tap*".