Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
tuong luong » thuong luong, tuong duong, trong luong
trinh chua » trinh cua, trinh chu, tinh chua
toc chieu » toc thieu, hoc thieu, doi chieu
doc hieu » toc thieu, hoc thieu, hoc hien
luong va » dung va
toan cau » toan cao, toan ban, toan tap
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc chieu) or (doc hieu)) sang - hanh ((trinh chua) OR (trinh chuan)) tuong luong va toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc chieu) OR (doc hieu)) sang - hanh ((trinh chua) OR (trinh chuan)) tuong luong va toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc chieu) or (doc hieu)) sang - hanh ((trinh chua) OR (trinh chuan)) tuong luong va toan cau".
• Adding a wildcard symbol may retrieve word variants: ((toc chieu) or (doc hieu)) sang - hanh ((trinh chua) OR (trinh chuan)) tuong luong va toan cau*.