Perhaps you should try some spelling variations:
nhung trong » hung trong, nhung tuong, thuong trong
theo chieu » theo tieu, ho chieu, theo chu
chieu sang » chieu sach, chieu xanh, hieu lang
trong tinh » truong tinh, trong kinh, trong sinh
thong cua » thong quan, thong tu, huong cua
hang tai » hang va, dung tai
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: theo chieu sang - hanh ((thong cua) or (hang tai)) nhung trong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sang - hanh ((thong cua) OR (hang tai)) nhung trong tinh toan ban*.