Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
nang cho » nang chon, ngang cho, nang cao
van hanh » van thanh, ban hanh, van anh
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
ty nang » ky nang, ty xang, ty hang
cho hoc » co hoc, khoa hoc
cac xuc » cac nuoc, chat xuc, cac cuoc
hanh di » hanh vi, hanh de, hang di
cua chu » sua chua
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: ((toc sach) OR (hoc sach)) ty nang cho hoc. hieu vien ((cac xuc) or (cam xuc)) van hanh di cua chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ty nang cho hoc. hieu vien ((cac xuc) OR (cam xuc)) van hanh di cua chu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ty nang cho hoc. hieu vien ((cac xuc) or (cam xuc)) van hanh di cua chu*".