Perhaps you should try some spelling variations:
dan hanh » dang hanh, dan khanh, dan thanh
thuc dan » thuc hanh, hoc dan, thuc vat
cam thuc » am thuc, nam thuc, cam thu
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
sach v » sach va, sach y, sach vay
va cam » va cham, va cac, va cao
sach 2 » sach y
vi cua » di cua
x hoi » xa hoi, o hoi, x ho

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 v) or (sach 2)) nang x hoi. hieu va cam thuc dan hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang x hoi. hieu va cam thuc dan hanh ((vi cua) OR (vai cua)) triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang x hoi. hieu va cam thuc dan hanh ((vi cua) or (vai cua)) triet*.