Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
su triet » su viet, su tien, ve triet
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va
lap su » lap du, lap tu, lai su
va ha » va hoa, va kha, va han

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 (v nang)) ma hoi. lieu va ha ((thuc va) or (luc va)) thanh lap su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) ma hoi. lieu va ha ((thuc va) OR (luc va)) thanh lap su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (v nang)) ma hoi. lieu va ha ((thuc va) or (luc va)) thanh lap su triet*".