Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
thanh ve » hanh ve, thanh va, thanh vien
thuc gia » thuc giai, thue gia, thuc dia
cua tre » cua te, cuu tre, cua triet
hanh va » hang va, hanh vi
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang x) or (nang ma)) hoi. hieu ve pham thuc gia ((thanh ve) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang x) OR (nang ma)) hoi. hieu ve pham thuc gia ((thanh ve) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang x) or (nang ma)) hoi. hieu ve pham thuc gia ((thanh ve) or (hanh va)) cua tre*.