Perhaps you should try some spelling variations:
thuoc dang » thuoc dung, thuoc khang, thuc dan
thuoc ban » thuoc tan, thu ban, thuoc ma
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
di cua » dai cua, doi cua, de cua
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang xa hoi. hieu ve nam ((thuoc ban) OR (thuoc dang)) thanh ((vai cua) or (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu ve nam ((thuoc ban) OR (thuoc dang)) thanh ((vai cua) OR (di cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu ve nam ((thuoc ban) OR (thuoc dang)) thanh ((vai cua) or (di cua)) te".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu ve nam ((thuoc ban) OR (thuoc dang)) thanh ((vai cua) or (di cua)) te*.