Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
thuc dan » thuc hanh, hoc dan, thuc vat
hanh vai » hanh vi, hanh va, hanh tai
nang cam » nang cham, nang cao, nang cap
sach thu » sach thue, sach thieu, sach tham
hang xa » hoang xa, hang va, hang ca
ki nang » ky nang
sach ty » sach y, sach tu, xach tay
vai cau » va cau, van cau, vai cac
xuc va » duc va, tuc va, luc va

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