Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
tinh vi » trinh vi, tinh voi, tinh va
su tien » su kien, su hien, tu tieng
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. hieu va cuoc ((duc va) or (tuc va)) tinh vi ((cuu tre) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu va cuoc ((duc va) OR (tuc va)) tinh vi ((cuu tre) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu va cuoc ((duc va) or (tuc va)) tinh vi ((cuu tre) or (su tien))*.