Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
ban hang » ngan hang
cham hoi » cham voi, cham h'roi, pham hoai
hang ve » hang va, hanh ve, hang ke
hoi ban » hoi dan, hoi bai, doi ban
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te 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 nang ((mai hoi) OR (lai hoi)). ((hieu van) or (thien van)) cham hoi ban hang ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((mai hoi) OR (lai hoi)). ((hieu van) OR (thien van)) cham hoi ban hang ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ((mai hoi) OR (lai hoi)). ((hieu van) or (thien van)) cham hoi ban hang ve cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((mai hoi) OR (lai hoi)). ((hieu van) or (thien van)) cham hoi ban hang ve cua tre*.