Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hoc van » hoc dan, hoc va, hoc vat
van am » van nam, van lam, van dam
am hoc » ad hoc
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: ((nguoi sach) or (te sach)) ky nang xa hoi. hieu van am hoc van hanh tai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nguoi sach) OR (te sach)) ky nang xa hoi. hieu van am hoc van hanh tai ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: ((nguoi sach) or (te sach)) ky nang xa hoi. hieu van am hoc van hanh tai ((cua te) or (cua tu))*.