Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, phan duc
va thanh » gia thanh, ban thanh, va tinh
pham duy » pham duc
su sach » so sach, vu sach
hai cua » thai cua, dai cua, hoi cua
lai cua » dai cua, lai chau, thai cua
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
ty nang » ky nang, ty xang, ty hang
co loi » co hoi

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

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