Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
truong va » truong dai, truong cao, truong dao
trung va » trang va, trung ha, trung tam
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cau » toan cao, toan ban, toan 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 thieu xanh - hanh ((trung va) OR (truong va)) nhung cong tap toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trung va) OR (truong va)) nhung cong tap toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trung va) OR (truong va)) nhung cong tap toan cau*.