Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » tu sach, thuat sach, thuoc sach
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
hieu ve » hieu va
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san
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: ((tu sac) or (thu sach)) ky dang xa hoi. ((hieu ve) or (hieu van)) cac nuoc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (thu sach)) ky dang xa hoi. ((hieu ve) OR (hieu van)) cac nuoc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (thu sach)) ky dang xa hoi. ((hieu ve) or (hieu van)) cac nuoc va hanh vi cua te*.