Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
dao thanh » ban thanh, tro thanh, de thanh
thuc dao » thuc dan, thuc day, chuc dao
dua tren » dung tren
thanh vi » hanh vi, thanh va, thanh ve
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((hanh kem) or (sach y)) lang xa hoi. hieu va pham thuc dao thanh vi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((hanh kem) OR (sach y)) lang xa hoi. hieu va pham thuc dao thanh vi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu ((hanh kem) or (sach y)) lang xa hoi. hieu va pham thuc dao thanh vi ((dua tren) or (cuu tre))*.