Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
pham duy » pham duc
hoc sach » hoc sinh, hoc cac, hoc anh
nang mai » nang ma, nang tai, lang mai
va nhanh » va thanh, va hanh, va nhan
hai cua » thai cua, hoi cua, lai cua
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
mai hoi » mai khoi, dai hoi, lai hoi
duy va » duy vat, duy van, day va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) ky nang mai hoi. hieu ve pham duy va nhanh ((hai cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang mai hoi. hieu ve pham duy va nhanh ((hai cua) OR (dai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky nang mai hoi. hieu ve pham duy va nhanh ((hai cua) or (dai cua)) tre*.