Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
trinh toan » tinh toan, thanh toan, trinh han
nang huong » nang thuong, nang luong, hang thuong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu tinh - canh ((trinh va) or (trinh toan)) nang huong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - canh ((trinh va) OR (trinh toan)) nang huong dan phan tu.
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - canh ((trinh va) or (trinh toan)) nang huong dan phan tu*.