Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
cam duc » cam xuc, cao duc, pham duc
sach ly » sach y, sach lo, sach ty
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach ty
va cam » va cham, va cac, va cao
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ly) or (sach tu)) nang xa hoi. hieu va cam duc va thanh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ly) OR (sach tu)) nang xa hoi. hieu va cam duc va thanh ((vi cua) OR (vai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ly) or (sach tu)) nang xa hoi. hieu va cam duc va thanh ((vi cua) OR (vai cua)) te".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ly) or (sach tu)) nang xa hoi. hieu va cam duc va thanh ((vi cua) OR (vai cua)) te*.