Perhaps you should try some spelling variations:
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
va nam » van nam, ha nam, va nay
nam tu » nam thu, nam thuc
tu lap » truc lap
tu cua » hu cua
vu cua » hu cua

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 tu lap trinh ((tu cua) OR (vu cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va nam tu lap trinh ((tu cua) OR (vu cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va nam tu lap trinh ((tu cua) OR (vu cua)) tre*.