Perhaps you should try some spelling variations:
loai tren » la tren, thai tren
cham xuc » cam xuc, chat xuc, cham soc
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van ban
thu sach » tu sach, thuat sach, thuoc sach
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang ha
van anh » van thanh, tuan anh, van minh
ky dang » ky nang, ky danh

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

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