Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
dung manh » duong manh, dung danh, hung manh
trinh va » trinh van, trinh vat, trinh ve
dung dan » dung dat, dung san, tung dan
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 hieu lang - hanh trinh va nhung ((dung manh) or (dung dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh trinh va nhung ((dung manh) OR (dung dan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh trinh va nhung ((dung manh) or (dung dan)) toan cau*.