Perhaps you should try some spelling variations:
sach thi » sach thu, sach tai, sach tham
lam thuc » lam thuoc, am thuc, nam thuc
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
cua viet » ca viet, hoa viet, cua vat
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
va lam » van lam, va lap
vi cua » vai cua, di cua

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 thi) or (sach thieu)) hang xa hoi. hieu va lam thuc dan hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thi) OR (sach thieu)) hang xa hoi. hieu va lam thuc dan hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thieu)) hang xa hoi. hieu va lam thuc dan hanh vi cua viet*.