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

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 am thuc van 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 am thuc van hanh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thi) or (sach thieu)) hang xa hoi. hieu va am thuc van hanh vi cua viet*.