Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
lang van » dang van, tang van, hoang van
pham huu » pham duy, phan huy
tam hanh » tam thanh, tam anh, tim hanh
hieu va » lieu va, hieu qua
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cuu tre, cua triet, dua tren
y lang » o lang, _ lang, tay lang
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: doc sach y lang van hoa. hieu va ((pham huu) or (pham duc)) tam hanh ve ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach y lang van hoa. hieu va ((pham huu) OR (pham duc)) tam hanh ve ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach y lang van hoa. hieu va ((pham huu) or (pham duc)) tam hanh ve ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: doc sach y lang van hoa. hieu va ((pham huu) or (pham duc)) tam hanh ve ((cua tre) OR (cua te))*.