Perhaps you should try some spelling variations:
trinh ban » trinh han, trinh san, trinh dan
quy trinh » qua trinh, quy dinh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
ban cua » ban quan
va nam » van nam, ha nam
va nay » va ngay, va cay
tu quy » tu duy, tu quynh
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((va nam) or (va nay)) tu quy trinh ban cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ((va nam) OR (va nay)) tu quy trinh ban cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ((va nam) or (va nay)) tu quy trinh ban cua viet*.