Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
mang cua » manh cua, dung cua, ban cua
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
qua cac » cua cac
va dinh » van dinh, va kinh, va tinh
cac lo » cac lop, cac co, cac bo
ca cua » co cua
lo va » lo van, lao va, ly va

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 cau hoi. hieu qua cac lo va dinh ((mang cua) or (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cau hoi. hieu qua cac lo va dinh ((mang cua) OR (ca cua)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang cau hoi. hieu qua cac lo va dinh ((mang cua) or (ca cua)) triet*.