Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thanh ha » thanh hoa, thanh hai, nhanh ha
cham tuc » nham thuc, tham thuc, cham soc
hanh va » hang va, hanh vi
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
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: su sach ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va ((thanh ha) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va ((thanh ha) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va ((thanh ha) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. lieu va ((cham tuc) OR (pham thuc)) va ((thanh ha) or (hanh va)) cua tre*.