Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va lam » van lam, va lap
vi cua » vai cua, di cua
va am » va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang xa hoi. hieu ((va am) or (va lam)) thuc van hanh ((vi cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang xa hoi. hieu ((va am) OR (va lam)) thuc van hanh ((vi cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. hieu ((va am) or (va lam)) thuc van hanh ((vi cua) or (dai cua)) te*.