Perhaps you should try some spelling variations:
cong huong » cong thuong, cong luong, cong hung
hanh trinh » canh tranh, hanh chinh
trinh sat » trinh san, trinh sau, trinh sai
hoc hieu » hoc thieu, doc hieu, hoc dieu
sat cong » bat cong, san cong, luat cong
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (hoc hien)) manh - hanh trinh sat cong huong dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc hien)) manh - hanh trinh sat cong huong dan ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc hien)) manh - hanh trinh sat cong huong dan ((toan tai) or (toan ban))*.