Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thanh ve » hanh ve, thanh va, thanh vien
cham tuc » nham thuc, tham thuc, cham soc
sach ky » sac ky, sach y, sach kem
cao hoi » cau hoi, co hoi, cao hoc
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te 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) OR (sach ty)) nang cao hoi. lieu va ((cham tuc) or (pham thuc)) gia thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) nang cao hoi. lieu va ((cham tuc) OR (pham thuc)) gia thanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach ty)) nang cao hoi. lieu va ((cham tuc) or (pham thuc)) gia thanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach ty)) nang cao hoi. lieu va ((cham tuc) or (pham thuc)) gia thanh ve cua tre*.