Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
sach tu » sach thu, cach tu, sach ty
tu hang » thu hang, tu hanh, tu hung
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
do thuc » hoc thuc, dan thuc
cua tu » cua tuc, cua su, cua vu
cua cu » cua chu, cua cau, cua su
va do » va dao, va doc, va co

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu hang xa hoi. hieu va do thuc dan hanh vi ((cua te) or (((cua tu) or (cua cu))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu hang xa hoi. hieu va do thuc dan hanh vi ((cua te) OR (((cua tu) OR (cua cu)))).
• Adding a wildcard symbol may retrieve word variants: toc sach tu hang xa hoi. hieu va do thuc dan hanh vi ((cua te) or (((cua tu) or (cua cu))))*.