Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
dao lam » da lam, dao nam, dat lam
dao bai » cao bai, dao hai, dao lai
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y lang » o lang, _ lang, tay lang
va hoc » van hoc
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 y lang xa hoi. hieu va hoc nuoc va ((dao lam) or (dao bai)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu va hoc nuoc va ((dao lam) OR (dao bai)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu va hoc nuoc va ((dao lam) or (dao bai)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu va hoc nuoc va ((dao lam) or (dao bai)) ((cua tre) OR (cuu tre))*.