Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
nhan luc » nang luc
ty hang » ly hang, thi hang, thu hang
hieu de » hieu ve, hieu he, hieu le
de nhan » do nhan, tue nhan, de thanh
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
dau tre » dau tren, dau tien, cau tren
luc va » duc va, tuc va, loc va
va dau » va dao

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 (thuat sach)) ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc va hanh va dau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ((ty xang) OR (ty hang)) xa hoi. hieu de nhan luc va hanh va dau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc va hanh va dau tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) ((ty xang) or (ty hang)) xa hoi. hieu de nhan luc va hanh va dau tre*.