Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
day thanh » dao thanh, dat thanh, da thanh
thuc day » thuc dan, thuc vat
dua tren » dung tren
thanh vi » hanh vi, thanh va, thanh ve
va phap » va phat, ban phap
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
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)) nang xa hoi. hieu va phap thuc day 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)) nang xa hoi. hieu va phap thuc day thanh vi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu ((hanh kem) or (sach y)) nang xa hoi. hieu va phap thuc day thanh vi ((dua tren) or (cuu tre))*.