Perhaps you should try some spelling variations:
hoc nghien » hoc hien
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan dung » quang dung, quan duong, qua dung
trong san » trong cac, cong san, dong san
ho nhiet » hoc nhiet, ho thiet, hoc thiet
san toan » van toan, dan toan, manh toan
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: ((ho nhiet) or (hoc nghien)) nang - hanh trinh quan dung trong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho nhiet) OR (hoc nghien)) nang - hanh trinh quan dung trong san toan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho nhiet) or (hoc nghien)) nang - hanh trinh quan dung trong san toan cau*.