Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cham tuc » nham thuc, tham thuc, cham soc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va thanh, va danh
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
de cuu » de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang cao hoi. lieu va ((cham tuc) or (pham thuc)) va hanh de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cao hoi. lieu va ((cham tuc) OR (pham thuc)) va hanh de cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cao hoi. lieu va ((cham tuc) or (pham thuc)) va hanh de cuu tre*.