Perhaps you should try some spelling variations:
sach tham » sach nha
trong van » trong cac
sach thu » sach thue, sach thieu, cach thuc
qua pham » quan pham, quy pham, qua cham
pham duy » pham duc
vat hanh » vat thanh, van hanh, va hanh
van hoi » van hoa, van hoc, van hoe
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach thu) or (sach tham)) trong van hoi. hieu qua pham duy vat hanh vi ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thu) OR (sach tham)) trong van hoi. hieu qua pham duy vat hanh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thu) or (sach tham)) trong van hoi. hieu qua pham duy vat hanh vi ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: so ((sach thu) or (sach tham)) trong van hoi. hieu qua pham duy vat hanh vi ((cua te) OR (cua tu))*.