Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
ly quang » le quang, vu quang
van pham » van phan, van phat, van tham
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
ty nang » ky nang, ty xang, ty hang
va cua » va chua, via cua, ca cua
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: thuoc sach ((ty nang) or (ly quang)) x ho. hieu ((van pham) OR (san pham)) duc va thanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ty nang) OR (ly quang)) x ho. hieu ((van pham) OR (san pham)) duc va thanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ty nang) or (ly quang)) x ho. hieu ((van pham) OR (san pham)) duc va thanh va cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((ty nang) or (ly quang)) x ho. hieu ((van pham) OR (san pham)) duc va thanh va cua te*.