Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
xuc van » duc van, luc van, vuc van
doi cua » dai cua, hoi cua
va cam » va cham, va cao, va cai
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: tu sach ty nang x ho. lieu ((va cam) OR (va cac)) xuc van hanh ((di cua) or (doi cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x ho. lieu ((va cam) OR (va cac)) xuc van hanh ((di cua) OR (doi cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x ho. lieu ((va cam) OR (va cac)) xuc van hanh ((di cua) or (doi cua)) vat".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x ho. lieu ((va cam) OR (va cac)) xuc van hanh ((di cua) or (doi cua)) vat*.