Perhaps you should try some spelling variations:
phat chuc » pham chuc, phap chuc, phap thuc
sach thu » sach thue, sach thieu, sach tham
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va danh, ban hanh
ve phat » va phat, te phat, de phat
hieu ve » hieu va, hieu van
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
cua tu » cua tuc, cua su, cua cu

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 ((nang ma) or (sang ma)) hoi. hieu ve phat chuc ((va hanh) OR (va thanh)) hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((nang ma) OR (sang ma)) hoi. hieu ve phat chuc ((va hanh) OR (va thanh)) hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu ((nang ma) or (sang ma)) hoi. hieu ve phat chuc ((va hanh) OR (va thanh)) hai cua tu".
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang ma) or (sang ma)) hoi. hieu ve phat chuc ((va hanh) OR (va thanh)) hai cua tu*.