Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
vat hanh » vat thanh, van hanh, va hanh
bo sach » co sach, hoc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
hai cua » thai cua, hoi cua, lai cua
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach thu nang ma hoi. hieu ve pham thuc vat hanh ((hai cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach thu nang ma hoi. hieu ve pham thuc vat hanh ((hai cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: bo sach thu nang ma hoi. hieu ve pham thuc vat hanh ((hai cua) or (dai cua)) te*.