Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban hanh » ban hang
pham cuc » pham chuc, pham cua, pham thuc
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
dang xa » dang xay, lang xa, dang ha
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
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: thuat sach ky dang xa hoi. hieu van ((pham cuc) or (pham duc)) ban hanh vi ((cua te) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky dang xa hoi. hieu van ((pham cuc) OR (pham duc)) ban hanh vi ((cua te) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: thuat sach ky dang xa hoi. hieu van ((pham cuc) or (pham duc)) ban hanh vi ((cua te) or (cau tren))*.