Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
tai cua » thai cua, tai cuc, tri cua
truc va » thuc va, thuc vat, trung va
ty hang » ly hang, ty xang, thi hang
va lam » van lam, va lap
luc va » duc va, tuc va, loc va
va hoi » va hoc, va hoa
cua su » qua su

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 ((va hoi) OR (xa hoi)). lieu va lam ((luc va) or (truc va)) hanh tai cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty hang ((va hoi) OR (xa hoi)). lieu va lam ((luc va) OR (truc va)) hanh tai cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang ((va hoi) OR (xa hoi)). lieu va lam ((luc va) or (truc va)) hanh tai cua su".
• Adding a wildcard symbol may retrieve word variants: te sach ty hang ((va hoi) OR (xa hoi)). lieu va lam ((luc va) or (truc va)) hanh tai cua su*.