Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
hanh hang » thanh hang, hang hang, hanh han
thong dan » thong van, tuong dan, thong den
ho chieu » theo chieu, hoc thieu, mot chieu
va thong » va thuong, va phuong, he thong
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: ((ho chieu) or (doi chieu)) xanh - hanh hang va thong thong dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - hanh hang va thong thong dan ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - hanh hang va thong thong dan ((toan tai) or (toan ban))*.