Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cau » van dau, van hau, van chat
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 ((nang xa) OR (nang x)) hoi. hieu van cau ((xuc va) or (thuc vat)) hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (nang x)) hoi. hieu van cau ((xuc va) OR (thuc vat)) hanh vi cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) OR (nang x)) hoi. hieu van cau ((xuc va) or (thuc vat)) hanh vi cua tu*".