Perhaps you should try some spelling variations:
xang cho » hang cho, tang cho, bang cho
van hanh » van thanh, ban hanh, van anh
sang cho » danh cho, dung cho, sang tao
te sach » toc sach
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
hieu ve » hieu va, hieu van
sach tu » sach thu, cach tu, sach ty
ve cac » va cac, vien cac
di cua » doi cua, de cua, do cua

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 tu ((xang cho) or (sang cho)) hoc. hieu ve cac vuc van hanh ((di cua) OR (dai cua)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((xang cho) OR (sang cho)) hoc. hieu ve cac vuc van hanh ((di cua) OR (dai cua)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((xang cho) or (sang cho)) hoc. hieu ve cac vuc van hanh ((di cua) OR (dai cua)) cau*".