Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ly nang » ky nang, ly hang, ly vang
ty hang » ly hang, ty xang, thi hang
hieu va » lieu va, hieu qua
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
va dat » va dao, va dau, va dap
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 ((ly nang) or (ty hang)) xa hoi. hieu va dat (nuoc or quoc) va tinh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (ty hang)) xa hoi. hieu va dat (nuoc OR quoc) va tinh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly nang) or (ty hang)) xa hoi. hieu va dat (nuoc or quoc) va tinh vi cua tu*.