Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
ty nang » ty xang, ty hang, ly nang
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
doi cua » dai cua, hoi cua
di cua » dai cua, de cua, do 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 ((ty nang) OR (ky nang)) x ho. lieu va cham duc van hanh ((di cua) or (doi cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ky nang)) x ho. lieu va cham duc van hanh ((di cua) OR (doi cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) OR (ky nang)) x ho. lieu va cham duc van hanh ((di cua) or (doi cua)) vat".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) OR (ky nang)) x ho. lieu va cham duc van hanh ((di cua) or (doi cua)) vat*.