Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hang mai » hoang mai, hang tai, hang hai
cham duc » pham duc, cham soc, pham duy
hanh va » hang va
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu su » hieu sau, hieu so, hieu suat
mai hoi » mai khoi, dai hoi, lai hoi
ty hang » ly hang, ty xang, thi hang
tieu su » thieu so

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 hang mai hoi. ((hieu su) or (tieu su)) cham duc van ((hanh va) or (hanh vi)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty hang mai hoi. ((hieu su) OR (tieu su)) cham duc van ((hanh va) OR (hanh vi)) cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang mai hoi. ((hieu su) or (tieu su)) cham duc van ((hanh va) or (hanh vi)) cua viet*.