Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
huu tre » cuu tre, huu them, huu tien
va hanh » van hanh, va thanh, va danh
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
huu tri » huu tai
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, 5 hoi

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 hang ((x hoi) or (x ho)). hieu va cac xuc va hanh dai ((huu tre) OR (huu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang ((x hoi) OR (x ho)). hieu va cac xuc va hanh dai ((huu tre) OR (huu tri))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang ((x hoi) or (x ho)). hieu va cac xuc va hanh dai ((huu tre) OR (huu tri))*".