Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
sach thi » sach thu, sach tai, sach thieu
te sach » toc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua
cua cu » cua chu, cua cau, cua su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thi ((nang xa) OR (lang xa)) hoi. hieu vien bach ((xuc van) OR (duc van)) hanh di cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thi ((nang xa) or (lang xa)) hoi. hieu vien bach ((xuc van) OR (duc van)) hanh di cua cu~".
• Adding a wildcard symbol may retrieve word variants: te sach thi ((nang xa) or (lang xa)) hoi. hieu vien bach ((xuc van) OR (duc van)) hanh di cua cu*.