Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nang mai » nang ma, nang tai, lang mai
van hanh » ban hanh, van anh, van ban
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
vi cua » vai 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: tu sach y nang mai hoi. hieu ((ve cam) or (va cam)) xuc ((van hanh) OR (van thanh)) vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai hoi. hieu ((ve cam) OR (va cam)) xuc ((van hanh) OR (van thanh)) vi cua vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang mai hoi. hieu ((ve cam) or (va cam)) xuc ((van hanh) OR (van thanh)) vi cua vat*".