Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
tuc va » thuc va, truc va, tuc xa
ve cai » va cai, ve cac, ve tai
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) OR (v nang)) xa hoi. hieu ((ve cai) or (va cam)) tuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu ((ve cai) OR (va cam)) tuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (v nang)) xa hoi. hieu ((ve cai) or (va cam)) tuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (v nang)) xa hoi. hieu ((ve cai) or (va cam)) tuc va hanh vi cua te*.