Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tai phan » tai thanh, tai phong, tai ngan
dan danh » van danh, han danh, ban danh
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
dai hai » dai han, dai hoi, dai tai
ly hang » ly quang
ve pham » vi pham, v pham, ve phan
do cua » doi cua, co cua, dong cua
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly hang ((tai phan) or (dai hai)). hieu ve pham thuc dan danh ((do cua) or (de cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly hang ((tai phan) OR (dai hai)). hieu ve pham thuc dan danh ((do cua) OR (de cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ly hang ((tai phan) or (dai hai)). hieu ve pham thuc dan danh ((do cua) or (de cua)) triet*.