Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
chuc van » chuc va, thuc van, chuc can
sach thu » sach thue, sach thieu, sach tham
bo sach » co sach, hoc sach
vai cua » dai cua, hai cua, lai cua
chu van » cuu van, chu han
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
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 ((nang cao) or (sang ma)) hoi. hieu ve pham ((chuc van) OR (chu van)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach thu ((nang cao) OR (sang ma)) hoi. hieu ve pham ((chuc van) OR (chu van)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach thu ((nang cao) or (sang ma)) hoi. hieu ve pham ((chuc van) OR (chu van)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: bo sach thu ((nang cao) or (sang ma)) hoi. hieu ve pham ((chuc van) OR (chu van)) hanh vai cua te*.