Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac toc » cac toi, cac nuoc, cac thoi
dan dai » dat dai, can dai, dan dat
cua tre » cuu tre, cua triet, dua tren
toc xa » tuc xa, toc ta, hoc xa
xa dan » ca dan, xa dai, va dan
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 ky lang xa hoi. hieu va cac toc xa dan dai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu va cac toc xa dan dai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu va cac toc xa dan dai ((cua tre) OR (cua te))*.