Perhaps you should try some spelling variations:
thu nang » thu hang, thu bang, tho nang
pham tai » pham thi, pham van
thi nang » thi cong, ki nang, thi hanh
cham cuu » cap cuu, chat cua
te sach » toc sach
va cham » va chat, va tham
tai cua » thai cua, tai cuc, tri cua
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
cuu va » cuu van, cuu ve
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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) or (o hoi)). hieu va cham cuu va pham tai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thu nang) OR (thi nang)) ((x hoi) OR (o hoi)). hieu va cham cuu va pham tai cua cu.
• Adding a wildcard symbol may retrieve word variants: te sach ((thu nang) or (thi nang)) ((x hoi) or (o hoi)). hieu va cham cuu va pham tai cua cu*.