Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
hanh lam » hanh kem, hanh va, dinh lam
cac dac » cac dan, cac dai, cac bac
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
dac va » duc va, day va, dat 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 ky lang ha noi. ((hieu ve) or (hieu van)) cac dac va ((hanh lam) OR (thanh lap)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang ha noi. ((hieu ve) OR (hieu van)) cac dac va ((hanh lam) OR (thanh lap)) su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang ha noi. ((hieu ve) or (hieu van)) cac dac va ((hanh lam) OR (thanh lap)) su triet*".