Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, tinh hai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ky dang » ky nang, ky danh
su choi » tu choi, san choi
hieu ve » hieu va, hieu van
va tinh » may tinh
cuc tre » duc tre, cua tre, cuu tre
su hoi » su hai, lu hoi, su doi
ve dat » de dat, va dat, ve dao
nuoc » quoc, duoc, ngoc

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) or (su sach)) ky dang ((su hoi) OR (su choi)). hieu ve dat nuoc va tinh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky dang ((su hoi) OR (su choi)). hieu ve dat nuoc va tinh tai cuc tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky dang ((su hoi) OR (su choi)). hieu ve dat nuoc va tinh tai cuc tre*".