Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
thu sach » tu sach, thuat sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
va thanh » gia thanh, ban thanh, va tinh
cham luc » cham soc, nhan luc, cham cuu
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
hieu vu » hieu ve, hieu su, dieu vu
nang xa » nang x, lang xa, nang ma
luc va » duc va, tuc va, loc va
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: thu sach thu nang xa hoi. ((hieu vu) OR (hieu va)) cham luc va thanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thu nang xa hoi. ((hieu vu) OR (hieu va)) cham luc va thanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thu nang xa hoi. ((hieu vu) OR (hieu va)) cham luc va thanh vai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu sach thu nang xa hoi. ((hieu vu) OR (hieu va)) cham luc va thanh vai ((cua tre) or (cua te))*.