Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thu sach » tu sach, thuat sach, thuoc sach
tan hanh » tang hanh, toan hanh, tran hanh
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va pham » van pham, va phat, va phap
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 x ho. lieu va pham duc ((tan hanh) OR (tan thanh)) ((di cua) or (doi cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang x ho. lieu va pham duc ((tan hanh) OR (tan thanh)) ((di cua) OR (doi cua)) vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang x ho. lieu va pham duc ((tan hanh) OR (tan thanh)) ((di cua) or (doi cua)) vat".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang x ho. lieu va pham duc ((tan hanh) OR (tan thanh)) ((di cua) or (doi cua)) vat*.