Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
phan thai » phan thi, phan hai, phan than
thu sach » tu sach, thuat sach, thu hoach
cham luc » cham soc, nhan luc, cham cuu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va phan » van phan, va phat, va phap
thai va » thai van
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va

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) OR (thuoc sach)) y nang xa hoi. hieu va cham luc va phan thai va (thiet or thieu)~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) y nang xa hoi. hieu va cham luc va phan thai va (thiet OR thieu).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) y nang xa hoi. hieu va cham luc va phan thai va (thiet or thieu)".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) y nang xa hoi. hieu va cham luc va phan thai va (thiet or thieu)*.