Perhaps you should try some spelling variations:
danh hoi » danh hoa, dan hoi, danh hoc
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam tuc » cam tu, nam thuc, dam thuc
va danh » va dinh, va dan, va hanh
cua cu » cua chu, cua cau, cua co
cua su » qua su

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 va ((cam tuc) or (cam xuc)) va danh hoi ((cua cu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang xa hoi. hieu va ((cam tuc) OR (cam xuc)) va danh hoi ((cua cu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang xa hoi. hieu va ((cam tuc) or (cam xuc)) va danh hoi ((cua cu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang xa hoi. hieu va ((cam tuc) or (cam xuc)) va danh hoi ((cua cu) OR (cua su))*.