Perhaps you should try some spelling variations:
van chat » cao chat
dinh cuu » dinh chi
van tham » van thanh, van tuan, van tai
te sach » toc sach
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa
soc va » hoc va, loc va, doc va
vi cuu » vi luu, vinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky tang ma hoi. hieu ((van tham) OR (van chat)) soc va hanh ((vi cuu) or (dinh cuu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang ma hoi. hieu ((van tham) OR (van chat)) soc va hanh ((vi cuu) OR (dinh cuu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky tang ma hoi. hieu ((van tham) OR (van chat)) soc va hanh ((vi cuu) or (dinh cuu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky tang ma hoi. hieu ((van tham) OR (van chat)) soc va hanh ((vi cuu) or (dinh cuu)) tre*.