Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
cham duc » pham duc, cham soc, pham duy
co sach » bo sach, cuon sach, hoc sach
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua tu » cua tuc, cua cu, cua te
cua su » qua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((ty nang) or (ty hang)) ma hoa. hieu ve cham duc va hanh lai ((cua tu) OR (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((ty nang) OR (ty hang)) ma hoa. hieu ve cham duc va hanh lai ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach ((ty nang) or (ty hang)) ma hoa. hieu ve cham duc va hanh lai ((cua tu) OR (cua su))".
• Adding a wildcard symbol may retrieve word variants: co sach ((ty nang) or (ty hang)) ma hoa. hieu ve cham duc va hanh lai ((cua tu) OR (cua su))*.