Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, cau treo
van cham » van chat, van tham, van pham
te sach » toc sach
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
ca tren » cu tren, la tren, co tren
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu ((van cham) or (va cham)) soc va hanh vi ((cau tren) OR (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((van cham) OR (va cham)) soc va hanh vi ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((van cham) or (va cham)) soc va hanh vi ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ((van cham) or (va cham)) soc va hanh vi ((cau tren) OR (ca tren))*.