Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
vien cam » vien cac, vien cao, vien nam
hoc sach » hoc sinh, hoc cac, hoc anh
doc sach » toc sach, nuoc sach, dac sac
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
hoi cua » hoi chuc
cua tu » cua tuc, cua su, cua cu

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 (doc sach)) ly nang xa hoi. hieu vien cam xuc ((van hanh) OR (van thanh)) hoi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (doc sach)) ly nang xa hoi. hieu vien cam xuc ((van hanh) OR (van thanh)) hoi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (doc sach)) ly nang xa hoi. hieu vien cam xuc ((van hanh) OR (van thanh)) hoi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (doc sach)) ly nang xa hoi. hieu vien cam xuc ((van hanh) OR (van thanh)) hoi cua tu*.