Perhaps you should try some spelling variations:
thi hang » thi hanh, thi nang, thi hong
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
sach thi » sach thu, sach tai, sach thieu
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
cac vuc » cac nuoc, cac vung, cac cuoc
vai cua » dai cua, hai cua, lai cua
vuc van » duc van, luc van, thuc van
cua chu » sua chua
hieu va » lieu va, hieu qua
cho hoc » khoa hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thi hang ((cho hoc) OR (co hoc)). ((hieu va) or (hieu van)) cac vuc van hanh vai cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thi hang ((cho hoc) OR (co hoc)). ((hieu va) OR (hieu van)) cac vuc van hanh vai cua chu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thi hang ((cho hoc) OR (co hoc)). ((hieu va) or (hieu van)) cac vuc van hanh vai cua chu*".