Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
chuan nang » chua nang, chuan trang, chuc nang
nang cong » nang song, dang cong, bang cong
cong tan » cong tac, cong san, cong thanh
toan tai » toan ban, toan cao, von tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sang - hanh trinh chuan nang cong tan ((((toan tai) or (doanh tai))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - hanh trinh chuan nang cong tan ((((toan tai) OR (doanh tai))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sang - hanh trinh chuan nang cong tan ((((toan tai) or (doanh tai))) or (toan tap))*.