Perhaps you should try some spelling variations:
pham thuc » pham chuc, nham thuc, pham thu
phap thuc » phap thu, phap hoc, phap tu
vat thanh » dat thanh, gat thanh, tat thanh
thanh van » thanh san, thanh toan, thanh phan
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan 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: so sach ty hang xa hoi. hieu va ((pham thuc) OR (phap thuc)) vat thanh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty hang xa hoi. hieu va ((pham thuc) OR (phap thuc)) vat thanh van cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ty hang xa hoi. hieu va ((pham thuc) OR (phap thuc)) vat thanh van cua te*.