Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, lieu va, hieu ve
cham luc » cham soc, nhan luc, cham cuu
han thai » han tai, ban thai, van thai
nang xa » nang x, lang xa, nang ma
thai va » thai van
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
va han » va phan, van han, va hanh
thiet » thieu

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 y nang xa hoi. ((hieu van) OR (thien van)) cham luc va han thai va thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. ((hieu van) OR (thien van)) cham luc va han thai va thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. ((hieu van) OR (thien van)) cham luc va han thai va thiet*.