Perhaps you should try some spelling variations:
trinh dong » trinh duong, trinh dung, trinh cong
nganh cong » nhanh chong, thanh cong
cao nganh » cac nganh, cau nganh, tao nganh
trinh do » trinh ky
cong khi » cong thai, khong khi, co khi
du hanh » dieu hanh, duy khanh, luu hanh
vu cao » cu cao, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( du hanh ((trinh do) or (trinh dong)) khi đong luc ) or ( vu cao nganh cong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( du hanh ((trinh do) OR (trinh dong)) khi đong luc ) OR ( vu cao nganh cong khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( du hanh ((trinh do) or (trinh dong)) khi đong luc ) or ( vu cao nganh cong khi đong luc ))*.