Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
hanh li » nhanh li, han li, thanh loi
sach ty » sach y, sach tu, sach thu
ca viet » va viet, co viet, hoa viet
hieu va » lieu va, hieu qua
ty tang » tay tang, ty xang, ty hang
me hoi » le hoi
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty tang ((me hoi) or (xa hoi)). hieu va nam thuc van ((hanh li) or (hanh vi)) ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty tang ((me hoi) OR (xa hoi)). hieu va nam thuc van ((hanh li) OR (hanh vi)) ca viet.
• Adding a wildcard symbol may retrieve word variants: su sach ty tang ((me hoi) or (xa hoi)). hieu va nam thuc van ((hanh li) or (hanh vi)) ca viet*.