Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
thai cua » than cua, tai cuc, tri cua
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
hai cua » dai cua, hoi cua, lai cua
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ve nam » he nam, va nam, le nam

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 ky ((nang xa) or (lang xa)) hoi. hieu ve nam thuc dan hanh ((hai cua) OR (thai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang xa)) hoi. hieu ve nam thuc dan hanh ((hai cua) OR (thai cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (lang xa)) hoi. hieu ve nam thuc dan hanh ((hai cua) OR (thai cua)) triet*".