Perhaps you should try some spelling variations:
thien van » thi van
tinh dai » trinh dai, tinh da, tinh hai
tu sach » thu sach, su sach, te sach
va tinh » may tinh
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
van am » van nam, van lam, van dam
am hoc » ad hoc
cua te » cua tu

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 ((y lang) or (_ lang)) xa hoi. thien van am hoc va tinh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (_ lang)) xa hoi. thien van am hoc va tinh dai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y lang) or (_ lang)) xa hoi. thien van am hoc va tinh dai cua te*.