Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
nang cam » nang cham, nang cao, nang cap
sach ty » sach y, sach tu, sach thu
vai cau » va cau, van cau, vai cac
tu sach » thu sach, su sach, te sach
ki nang » ky nang
ty hang » ly hang, ty xang, thi hang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va hoi » xa hoi, va hoc, va hoa

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 ty hang va hoi. ki nang cam ((((xuc va) OR (tuc va))) or (thuc dan)) hanh vai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty hang va hoi. ki nang cam ((((xuc va) OR (tuc va))) OR (thuc dan)) hanh vai cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty hang va hoi. ki nang cam ((((xuc va) OR (tuc va))) or (thuc dan)) hanh vai cau tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang va hoi. ki nang cam ((((xuc va) OR (tuc va))) or (thuc dan)) hanh vai cau tren*.