Perhaps you should try some spelling variations:
sach tham » sach nha
van phat » va phat, van chat, van phan
hanh tai » thanh tai, hang tai, han tai
hieu van » hieu va, thien van, lieu va
sach thu » sach thue, sach thieu, cach thuc
phat huu » pham huu, chat huu, phat huy
hanh va » hang va, hanh vi
nang ma » tang ma, sang ma, nang cao
huu va » cuu va, tuu 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: bo ((sach thu) OR (sach tham)) nang ma hoa. hieu van phat huu va ((hanh va) or (hanh tai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo ((sach thu) OR (sach tham)) nang ma hoa. hieu van phat huu va ((hanh va) OR (hanh tai)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo ((sach thu) OR (sach tham)) nang ma hoa. hieu van phat huu va ((hanh va) or (hanh tai)) cua te".
• Adding a wildcard symbol may retrieve word variants: bo ((sach thu) OR (sach tham)) nang ma hoa. hieu van phat huu va ((hanh va) or (hanh tai)) cua te*.