Perhaps you should try some spelling variations:
thuc ban » thuoc ban, thu ban, thuc van
thuc dan » thuc hanh, hoc dan, thuc vat
thanh vi » hanh vi, thanh va, thanh ve
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu he » hieu ve, hiem he, hieu le
he nam » ha nam, nghe nam
vi luu » vi lua
tru » truc

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) or (thu hoach)) ky nang xa hoi. hieu he nam ((thuc ban) OR (thuc dan)) thanh vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ky nang xa hoi. hieu he nam ((thuc ban) OR (thuc dan)) thanh vi luu tru.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu hoach)) ky nang xa hoi. hieu he nam ((thuc ban) OR (thuc dan)) thanh vi luu tru".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu hoach)) ky nang xa hoi. hieu he nam ((thuc ban) OR (thuc dan)) thanh vi luu tru*.