Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong lang, cong nong
cong quang » luong quang, thong quang, duong quang
trinh van » trinh han, trinh quan, trinh toan
theo chu » theo chieu, cho chu, chao chu
chu xang » chua xang, chu bang, chuc nang
trinh va » trinh vat, trinh ve, trinh vi
toan cau » 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: theo chu xang - hanh ((trinh va) or (trinh van)) nhung ((cong ngang) OR (cong quang)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xang - hanh ((trinh va) OR (trinh van)) nhung ((cong ngang) OR (cong quang)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xang - hanh ((trinh va) or (trinh van)) nhung ((cong ngang) OR (cong quang)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chu xang - hanh ((trinh va) or (trinh van)) nhung ((cong ngang) OR (cong quang)) toan cau*.