Perhaps you should try some spelling variations:
trinh han » trinh quan
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 tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve nam » he nam, va nam, le nam
tu quy » tu duy
han su » nhan su, hanh su, dan 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 tu nang xa hoi. hieu ve nam ((tu quy) or (tu quynh)) trinh han su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. hieu ve nam ((tu quy) OR (tu quynh)) trinh han su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. hieu ve nam ((tu quy) or (tu quynh)) trinh han su triet*.