Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
cong manh » cong danh, duong manh, cong thanh

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 tuan) or (trung cap)) nhung cong manh ((toan ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trung tuan) OR (trung cap)) nhung cong manh ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trung tuan) or (trung cap)) nhung cong manh ((toan ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trung tuan) or (trung cap)) nhung cong manh ((toan ban) OR (van ban))*.