Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
nang cho » nang chon, ngang cho, nang cao
hanh di » hanh vi, hanh de, hang di
vuc van » duc van, luc van, thuc van
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
sach ty » sach y, sach tu, xach tay
cho hoc » co hoc, khoa hoc
cua cau » cua cac, cua chu, cua cay
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((sach ty) or (sach thu)) nang cho hoc. hieu ve chat ((xuc van) OR (vuc van)) hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((sach ty) OR (sach thu)) nang cho hoc. hieu ve chat ((xuc van) OR (vuc van)) hanh di cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((sach ty) or (sach thu)) nang cho hoc. hieu ve chat ((xuc van) OR (vuc van)) hanh di cua cau*".