Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
xa hanh » xa thanh, xa khanh, va hanh
vai cua » dai cua, hai cua, lai cua
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: thu sach y ((nang ma) OR (sang ma)) hoi. hieu va cam tuc xa hanh ((vi cua) or (vai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang ma) OR (sang ma)) hoi. hieu va cam tuc xa hanh ((vi cua) OR (vai cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang ma) OR (sang ma)) hoi. hieu va cam tuc xa hanh ((vi cua) or (vai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang ma) OR (sang ma)) hoi. hieu va cam tuc xa hanh ((vi cua) or (vai cua)) tu*.