Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc anh
thi nang » thi cong, ki nang, thi hanh
nang cho » nang chon, ngang cho, nang cao
vuc van » duc van, luc van, thuc van
cac vuc » cac nuoc, cac vung, cac cuoc
hieu ve » hieu va, hieu van
cho hoc » co hoc, khoa hoc
hoc cac » hoc cao
cua cau » cua cac, cua chu, cua cay
ve cac » va cac, vien cac
anh vi » anh va, anh ve, anh vu

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

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