Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
nam thuoc » nam thuc, nam thu, nha thuoc
hoc sach » hoc cac, hoc anh
thai cua » than cua, tai cuc, tri cua
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
nam tu » nam thu, nam thuc
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: ((hoc sach) OR (hoc sinh)) ky dang xa hoi. hieu van ((nam tu) or (nam thuoc)) van hanh thai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (hoc sinh)) ky dang xa hoi. hieu van ((nam tu) OR (nam thuoc)) van hanh thai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) OR (hoc sinh)) ky dang xa hoi. hieu van ((nam tu) or (nam thuoc)) van hanh thai cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) OR (hoc sinh)) ky dang xa hoi. hieu van ((nam tu) or (nam thuoc)) van hanh thai cua te*.