Perhaps you should try some spelling variations:
te sach » toc sach
cac vuc » cac nuoc, cac vung, cac cuoc
hanh ve » hanh vi, hanh va, hanh kem
sach ty » sach y, sach tu, sach thu
vuc van » duc van, luc van, thuc van
hieu ve » hieu va, hieu van
cao hoc » co hoc, cho hoc, chat hoc
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
anh vi » hanh vi, anh va, anh vu
anh ve » anh va, anh viet, thanh ve

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