Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
quang cua » quan cua, quang tuan, quang huy
cua nhung » va nhung
toan tai » doanh tai, toan ban, toan cao
toan tap » toan 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 sach - nhanh quang cua nhung huong dan ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - nhanh quang cua nhung huong dan ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - nhanh quang cua nhung huong dan ((toan tai) or (toan tap))*.