Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
trong dan » trong dang, trong san, trong tan
hieu van » hieu va, thien van, lieu va
cua dung » cua dang, cua dong, qua dung
dan toan » van toan, dan than, 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 ((((hieu lang) or (chieu tinh))) or (hieu van)) - hanh trinh cua dung trong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (chieu tinh))) OR (hieu van)) - hanh trinh cua dung trong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu lang) or (chieu tinh))) or (hieu van)) - hanh trinh cua dung trong dan toan cau*.