Perhaps you should try some spelling variations:
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va nam » van nam, ha nam, va nay
thu va » thue va, tu va, thu ha

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 hang xa hoi. hieu va nam ((thu va) OR (thuc va)) hanh vi ((cua vat) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang xa hoi. hieu va nam ((thu va) OR (thuc va)) hanh vi ((cua vat) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty hang xa hoi. hieu va nam ((thu va) OR (thuc va)) hanh vi ((cua vat) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty hang xa hoi. hieu va nam ((thu va) OR (thuc va)) hanh vi ((cua vat) or (hoa viet))*.