Perhaps you should try some spelling variations:
thu nang » thu hang, thu bang, tho nang
thi nang » thi cong, ki nang, thi hanh
cham cuu » cap cuu, chat cua
te sach » toc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tai cua » thai cua, tri cua, dai cua
cuu va » cuu van, cuu ve
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((thu nang) or (thi nang)) x hoi. hieu va cham cuu va phat ((tai cua) OR (tai cuc)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thi nang)) x hoi. hieu va cham cuu va phat ((tai cua) OR (tai cuc)) cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thu nang) or (thi nang)) x hoi. hieu va cham cuu va phat ((tai cua) OR (tai cuc)) cu".
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) or (thi nang)) x hoi. hieu va cham cuu va phat ((tai cua) OR (tai cuc)) cu*.