Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
thuc dang » thuoc dang, thuc dan, thuc dung
va triet » va thiet, va trien, ve triet
cam thuc » am thuc, nam thuc, cam thu
hieu va » hieu qua
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach y, sach vay
sach 2 » sach y
vi va » vi van, vai va, vu va

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 v) or (sach 2)) nang xa hoi. ((hieu va) or (lieu va)) cam thuc dang hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) nang xa hoi. ((hieu va) OR (lieu va)) cam thuc dang hanh vi va triet.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach 2)) nang xa hoi. ((hieu va) or (lieu va)) cam thuc dang hanh vi va triet*.