Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, thuoc sach, nuoc sach
hanh tai » thanh tai, hang tai, han tai
doc sach » hoc sach, nuoc sach, dac sac
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
tai cua » thai cua, tai cuc, tri cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (doc sach)) ky nang x hoi. thien van cam ((thuc va) or (truc va)) hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (doc sach)) ky nang x hoi. thien van cam ((thuc va) OR (truc va)) hanh tai cua te.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (doc sach)) ky nang x hoi. thien van cam ((thuc va) or (truc va)) hanh tai cua te*.