Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
nam xua » nam cua, nam mua, nam qua
vi cua » vai cua, di cua
cua te » cua tu

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

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