Perhaps you should try some spelling variations:
thanh loi » thanh hoa, thanh hai, thanh lap
su triet » su tien, ve triet
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
su viet » so viet
ve chat » va chat, van chat
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
ma hoi » mai hoi, xa hoi, ma hoa
xuc xa » buc xa

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 ly nang ma hoi. hieu ve chat ((xuc xa) OR (tuc xa)) thanh loi ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ma hoi. hieu ve chat ((xuc xa) OR (tuc xa)) thanh loi ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang ma hoi. hieu ve chat ((xuc xa) OR (tuc xa)) thanh loi ((su triet) or (su viet))".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ma hoi. hieu ve chat ((xuc xa) OR (tuc xa)) thanh loi ((su triet) or (su viet))*.