Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
hoc sach » hoc sinh, hoc cac, hoc anh
danh vai » danh sai, danh va, doanh van
va trien » va truyen, va thiet, va tieng
va tuyen » va truyen, tac tuyen, ke tuyen
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve pham » vi pham, v pham, ve phan
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty lang xa hoi. hieu ve pham thuc va danh vai ((va trien) or (va tuyen))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty lang xa hoi. hieu ve pham thuc va danh vai ((va trien) OR (va tuyen)).
• Adding a wildcard symbol may retrieve word variants: hoc sach ty lang xa hoi. hieu ve pham thuc va danh vai ((va trien) or (va tuyen))*.