Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
van cham » van chat, van tham, va cham
cham tuc » nham thuc, pham thuc, tham thuc
nang xa » nang x, lang xa, nang ma
va kinh » va tinh, qua kinh
dat cua » dai cua, day cua, dan cua
mat cua » ma cua, manh cua, mang cua
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang xa hoi. thien van cham tuc va kinh ((dat cua) OR (mat cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang xa hoi. thien van cham tuc va kinh ((dat cua) OR (mat cua)) te".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang xa hoi. thien van cham tuc va kinh ((dat cua) OR (mat cua)) te*.