Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cham tuc » nham thuc, tham thuc, cham soc
tu sach » thu sach, su sach, te sach
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
cuc tre » duc tre, cua tre, cuu tre
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu ve ((cham tuc) OR (pham thuc)) ((va danh) or (va dinh)) tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve ((cham tuc) OR (pham thuc)) ((va danh) OR (va dinh)) tai cuc tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve ((cham tuc) OR (pham thuc)) ((va danh) or (va dinh)) tai cuc tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve ((cham tuc) OR (pham thuc)) ((va danh) or (va dinh)) tai cuc tre*.