Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
tham thuc » nham thuc, tam thuc, thai thuc
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
tang van » dang van, hoang van, trong van
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
tang ma » mang may
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) OR (tang van)) 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) OR (tang van)) hoi. lieu va ((tham thuc) OR (pham thuc)) va thanh ve cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((tang ma) OR (tang van)) 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) OR (tang van)) hoi. lieu va ((tham thuc) or (pham thuc)) va thanh ve cua te*.