Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
hanh thai » nhanh thai, hinh thai, hanh tai
cham tuc » nham thuc, tham thuc, cham soc
thai cua » than cua, tai cuc, tri cua
thu sach » thuat sach, thuoc sach, thu hoach
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet

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