Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh suat » trinh luat, trinh sat, trinh luan
trinh quan » tinh quang, trinh luat, trinh han
dung huong » dung thuong, dung phuong, dong huong
hoc thieu » toc thieu, hoc hien
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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 ((trinh suat) OR (trinh quan)) dung huong dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((trinh suat) OR (trinh quan)) dung huong dan ((toan tai) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trinh suat) OR (trinh quan)) dung huong dan ((toan tai) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh suat) OR (trinh quan)) dung huong dan ((toan tai) or (toan ban))*.