Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh tai » thanh tai, hang tai, han tai
thuc va » thuc vat, thuc dan, thuc day
ty hang » ty xang, thi hang, thu hang
tai cua » thai cua, tai cuc, tri cua
ly hang » ly quang
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((ty hang) or (ly hang)) xa hoi. hieu va cam ((xuc va) or (thuc va)) hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ty hang) OR (ly hang)) xa hoi. hieu va cam ((xuc va) OR (thuc va)) hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: thuat sach ((ty hang) or (ly hang)) xa hoi. hieu va cam ((xuc va) or (thuc va)) hanh tai cua te*.