Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai
cam thuc » am thuc, nam thuc, cam thu
thuc dan » thuc hanh, hoc dan, thuc vat
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ly nang » ky nang, ly vang, ly quang
ly hang » ly quang
hieu ve » hieu va, hieu van
y nang » ky nang, v nang, may nang
ve cam » ve cham, ve cac, va cam
lap va » tap 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 ((y nang) or (((ly nang) OR (ly hang)))) ma hoa. hieu ve cam thuc dan thanh lap va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (((ly nang) OR (ly hang)))) ma hoa. hieu ve cam thuc dan thanh lap va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (((ly nang) OR (ly hang)))) ma hoa. hieu ve cam thuc dan thanh lap va triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (((ly nang) OR (ly hang)))) ma hoa. hieu ve cam thuc dan thanh lap va triet*.