Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
nang cho » nang chon, ngang cho, nang cao
van hai » van ha, van chat, van hanh
vai cua » dai cua, hai cua, lai cua
vuc van » duc van, luc van, thuc van
van bac » van ban, van bao, van hac
sach ty » sach y, sach tu, sach thu
van cau » van dau, van hau, van chat
cho hoc » co hoc, khoa hoc
ty nang » ky nang, ty xang, ty hang
cua cay » cua cac

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 ty nang cho hoc. hieu ((((van cau) or (van bac))) or (van hai)) vuc van thanh vai cua cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cho hoc. hieu ((((van cau) OR (van bac))) OR (van hai)) vuc van thanh vai cua cay*.