Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
day nhanh » day thanh, duy nhanh, dac nhan
pham thuc » phap thuc, nham thuc, pham thu
day hanh » day thanh, dao hanh, day manh
sach ty » sach y, sach tu, sach thu
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua

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 ty nang xa hoi. hieu ve ((pham thuc) OR (pham chuc)) ((day hanh) or (day nhanh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang xa hoi. hieu ve ((pham thuc) OR (pham chuc)) ((day hanh) OR (day nhanh)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang xa hoi. hieu ve ((pham thuc) OR (pham chuc)) ((day hanh) or (day nhanh)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang xa hoi. hieu ve ((pham thuc) OR (pham chuc)) ((day hanh) or (day nhanh)) de cua tre*.