Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
dao thanh » ban thanh, tro thanh, de thanh
day hanh » day nhanh, day thanh, dao hanh
sach ky » sach y, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
v pham » vi pham, d pham
hieu v » hieu va, hieu ve, hieu 2
sac ky » cac ky, sai ky
de cua » le cua, te cua, dieu cua
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: vu ((sach ky) OR (sac ky)) nang x hoi. hieu v pham chuc ((day hanh) or (dao thanh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sac ky)) nang x hoi. hieu v pham chuc ((day hanh) OR (dao thanh)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sac ky)) nang x hoi. hieu v pham chuc ((day hanh) or (dao thanh)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sac ky)) nang x hoi. hieu v pham chuc ((day hanh) or (dao thanh)) de cua tre*.