Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
hanh lai » hanh lam, thanh lap, thanh loi
hanh tai » thanh tai, hang tai, han tai
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
duc van » duc va, duc tan, duc manh
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 van cham duc van ((hanh lai) OR (hanh tai)) cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu van cham duc van ((hanh lai) OR (hanh tai)) cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu van cham duc van ((hanh lai) OR (hanh tai)) cua viet*.