Perhaps you should try some spelling variations:
trinh dan » trinh han, trinh san, trinh da
tu quynh » thu quynh, thuy quynh, truc quynh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu he » hieu ve, hiem he, hieu le
he nam » ha nam, nghe nam
tu quy » tu duy
dan su » dang su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty xang xa hoi. hieu he nam ((tu quy) or (tu quynh)) trinh dan su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. hieu he nam ((tu quy) OR (tu quynh)) trinh dan su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. hieu he nam ((tu quy) or (tu quynh)) trinh dan su triet*.