Perhaps you should try some spelling variations:
trinh chat » tinh chat, trinh luat, trinh han
hanh trinh » canh tranh, hanh chinh
chat trung » chat trong, ha trung, cua trung
trung long » truong long, trung uong, trong long
long span » cong san, dong san, nong san
span phan » san phan, san pham, luan phan
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc thieu) or (doi chi)) tinh - hanh trinh chat trung long span phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc thieu) OR (doi chi)) tinh - hanh trinh chat trung long span phan tu*.