Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
thu sach » thuat sach, thuoc sach, thu hoach
chuc ban » chuc can, chuc van, cuc ban
va pham » van pham, va phat, va phap
hanh de » hanh ve, hanh kem
tu sach » su sach, te sach, tu cach
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
anh de » anh d, anh ve, anh du
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (thu sach)) ky nang x hoi. hieu va pham chuc ban ((anh de) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang x hoi. hieu va pham chuc ban ((anh de) OR (hanh de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang x hoi. hieu va pham chuc ban ((anh de) or (hanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang x hoi. hieu va pham chuc ban ((anh de) or (hanh de)) cua tre*.