Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
han nang » phan nang, ban nang, han yang
van nang » van quang, van ban, van dong
te sach » toc sach
hieu va » lieu va, hieu qua
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao
luc va » duc va, loc va
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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 ((han nang) or (van nang)) o hoi. hieu va cam ((luc va) or (tuc va)) thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((han nang) OR (van nang)) o hoi. hieu va cam ((luc va) OR (tuc va)) thanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ((han nang) or (van nang)) o hoi. hieu va cam ((luc va) or (tuc va)) thanh dai cua te*.