Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
hieu van » hieu va, thien van, lieu va
van chat » cao chat
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
hang cho » sang cho, hang khoa, phong cho
sach ty » sach tu, sach thu, xach tay
cho hoi » cho hoc, cho moi, cho doi
cua tre » cua te, cuu tre, cua triet
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: te ((sach ty) or (sach y)) hang cho hoi. hieu van chat truc ((ban hanh) or (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach y)) hang cho hoi. hieu van chat truc ((ban hanh) OR (van hanh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach y)) hang cho hoi. hieu van chat truc ((ban hanh) or (van hanh)) vi cua tre*.