Perhaps you should try some spelling variations:
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
tai cua » tai cuc, tri cua, dai cua
cao hoc » co hoc, cho hoc, chat hoc
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, duc man
sach ky » sac ky, sach y, sach ty
dua ban » dia ban, cua ban, qua ban
va cam » va cham, va cac, va cao

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 ky nang cao hoc. hieu va cam ((duc ban) or (dua ban)) thanh ((tai cua) OR (thai cua)) tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cao hoc. hieu va cam ((duc ban) OR (dua ban)) thanh ((tai cua) OR (thai cua)) tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cao hoc. hieu va cam ((duc ban) or (dua ban)) thanh ((tai cua) OR (thai cua)) tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoc. hieu va cam ((duc ban) or (dua ban)) thanh ((tai cua) OR (thai cua)) tu*.