Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
thu sach » tu sach, thuat sach, thu hoach
dau tren » dau tien, dat tren, dau tieng
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
de dau » dem dau, de dao, de dat
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: ((thu sach) or (((thuoc sach) OR (nuoc sach)))) ky nang x hoi. lieu va cam tuc va hanh de dau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((thuoc sach) OR (nuoc sach)))) ky nang x hoi. lieu va cam tuc va hanh de dau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (((thuoc sach) OR (nuoc sach)))) ky nang x hoi. lieu va cam tuc va hanh de dau tren".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((thuoc sach) OR (nuoc sach)))) ky nang x hoi. lieu va cam tuc va hanh de dau tren*.