Perhaps you should try some spelling variations:
tham thuc » nham thuc, tam thuc, thai thuc
pham thuc » phap thuc, pham chuc, nham thuc
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
ve cua » le cua, de cua, te cua
cua te » cua tu

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 tang ma hoi. lieu va ((tham thuc) or (pham thuc)) va thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang ma hoi. lieu va ((tham thuc) OR (pham thuc)) va thanh ve cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky tang ma hoi. lieu va ((tham thuc) or (pham thuc)) va thanh ve cua te*.