Perhaps you should try some spelling variations:
bat thanh » ban thanh, bac thanh, dat thanh
thai cua » than cua, tai cuc, tri cua
nang mai » nang ma, nang tai, lang mai
luc bat » suc bat, luc nhat, luat bat
tai cua » tai cuc, tri cua, dai cua
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
va cao » va co, va dao, va bao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang mai hoi. lieu ((va cao) or (va cac)) luc bat thanh ((tai cua) OR (thai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang mai hoi. lieu ((va cao) OR (va cac)) luc bat thanh ((tai cua) OR (thai cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang mai hoi. lieu ((va cao) or (va cac)) luc bat thanh ((tai cua) OR (thai cua)) viet*".