Perhaps you should try some spelling variations:
vai cuu » vai cua
va dinh » van dinh, va kinh, va tinh
sach ty » sach tu, sach thu, xach tay
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
cao hoi » cau hoi, co hoi, cao hoc
va dan » ca dan, va dao, va dau
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) or (sach y)) nang cao hoi. hieu ve cam xuc ((va dinh) or (va dan)) vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang cao hoi. hieu ve cam xuc ((va dinh) OR (va dan)) vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sach y)) nang cao hoi. hieu ve cam xuc ((va dinh) or (va dan)) vai cuu tre*.