Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu nang » thi nang, thu hang, tho nang
van hanh » van thanh, ban hanh, van anh
thu bang » thu ban, thu hang, chu bang
va hanh » va thanh, va danh, ban hanh
qua cac » cua cac
cac luc » cau luc, coc luc, cac nuoc
di cua » dai cua, doi cua, de cua
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: thuat sach ((thu nang) OR (thu bang)) xa hoi. hieu qua cac luc ((va hanh) or (van hanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((thu nang) OR (thu bang)) xa hoi. hieu qua cac luc ((va hanh) OR (van hanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((thu nang) OR (thu bang)) xa hoi. hieu qua cac luc ((va hanh) or (van hanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((thu nang) OR (thu bang)) xa hoi. hieu qua cac luc ((va hanh) or (van hanh)) di cua te*.