Perhaps you should try some spelling variations:
trinh khoa » trinh hoa, sinh khoa, trinh hoi
thi chieu » thi chien, thi hieu, theo chieu
trinh kha » trinh khai, trinh kham, trinh khac
nang nong » nang song, hang nong, nang dong
theo chu » theo chieu, cho chu, chao chu
nong tan » cong tan, nong dan, nong san
tan toan » tan tran, tap toan, van toan
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: ((thi chieu) or (theo chu)) xanh - hanh ((trinh kha) OR (trinh khoa)) nang nong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (theo chu)) xanh - hanh ((trinh kha) OR (trinh khoa)) nang nong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (theo chu)) xanh - hanh ((trinh kha) OR (trinh khoa)) nang nong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (theo chu)) xanh - hanh ((trinh kha) OR (trinh khoa)) nang nong tan toan cao*.