Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
tham tuc » tham thuc, thai tuc, nham thuc
cao hoi » cau hoi, co hoi, cao hoc
va tham » van tham, va cham, va thanh
va dinh » van dinh, va kinh, va tinh
dat cua » day cua, dan cua, bat 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: hoc sach y nang cao hoi. lieu va tham tuc va dinh ((((dat cua) OR (mat cua))) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang cao hoi. lieu va tham tuc va dinh ((((dat cua) OR (mat cua))) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y nang cao hoi. lieu va tham tuc va dinh ((((dat cua) OR (mat cua))) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang cao hoi. lieu va tham tuc va dinh ((((dat cua) OR (mat cua))) or (dai cua)) tre*.