Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
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 ((tinh cua) or (trinh cua)) cong ((cong tap) OR (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - hanh ((tinh cua) OR (trinh cua)) cong ((cong tap) OR (cong tan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((tinh cua) or (trinh cua)) cong ((cong tap) OR (cong tan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((tinh cua) or (trinh cua)) cong ((cong tap) OR (cong tan)) toan cao*.