Perhaps you should try some spelling variations:
cuu thuc » cuu tac
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
qua cuu » qua cua, qua cu, cua cuu
hanh ve » hanh vi, hanh va, hanh kem
y lang » o lang, _ lang, tay lang
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: tu sach y lang xa hoi. hieu qua cuu thuc dan hanh ve ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y lang xa hoi. hieu qua cuu thuc dan hanh ve ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu qua cuu thuc dan hanh ve ((cua te) or (cua tu))*.