Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van dat » van dao, van dau, van dan
dan dat » dung dat, dong dat, dinh dat
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 ty nang xa hoi. hieu ((van dat) OR (dan dat)) (nuoc or quoc) va tinh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((van dat) OR (dan dat)) (nuoc OR quoc) va tinh vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ((van dat) OR (dan dat)) (nuoc or quoc) va tinh vi cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((van dat) OR (dan dat)) (nuoc or quoc) va tinh vi cua tu*.