Perhaps you should try some spelling variations:
tinh bai » tinh bac, tinh hai, hinh bai
nhan loc » nhan luc, nhan hoc, nhan loai
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
sach ky » sac ky, sach ty, sach kem
va tinh » may tinh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ky) OR (sach y)) dang xa hoi. hieu va nhan loc va tinh bai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ky) OR (sach y)) dang xa hoi. hieu va nhan loc va tinh bai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ky) OR (sach y)) dang xa hoi. hieu va nhan loc va tinh bai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ky) OR (sach y)) dang xa hoi. hieu va nhan loc va tinh bai ((cua tre) or (cuu tre))*.