Perhaps you should try some spelling variations:
kham chua » kham pha
pham chuc » pham duc, pham huu, pham huy
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
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: so sach thu ((mang may) or (sang ma)) hoi. hieu ve ((pham chuc) OR (kham chua)) va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((mang may) OR (sang ma)) hoi. hieu ve ((pham chuc) OR (kham chua)) va hanh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu ((mang may) or (sang ma)) hoi. hieu ve ((pham chuc) OR (kham chua)) va hanh vai cua te*".