Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
hieu van » hieu va, thien van, lieu va
lap cua » lai cua, tap cua, lam cua
van cam » van nam, van lam, van cau
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
co loi » co hoi
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu

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 ((ty nang) OR (ty hang)) co loi. hieu van cam ((xuc va) or (tuc va)) thanh lap cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) co loi. hieu van cam ((xuc va) OR (tuc va)) thanh lap cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty hang)) co loi. hieu van cam ((xuc va) or (tuc va)) thanh lap cua tu".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty hang)) co loi. hieu van cam ((xuc va) or (tuc va)) thanh lap cua tu*.