Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
khai sang » kha nang, nha sang, thai bang
cong lang » cong vang, cong luong, cong quang
lang toan » dang toan, lang thang, lang thanh
doi khai » doi khi, toi khai, doi khang
ve trong » ke trong, te trong, ve tuong
le trong » le trung, ly trong, le tang
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: doi khai sang - hanh trinh ((ve trong) or (le trong)) cong lang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khai sang - hanh trinh ((ve trong) OR (le trong)) cong lang toan cao.
• Adding a wildcard symbol may retrieve word variants: doi khai sang - hanh trinh ((ve trong) or (le trong)) cong lang toan cao*.