Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
danh dien » dinh dien, danh kien, danh lien
tham soc » cham soc, thai son, ham so
te sach » toc sach
cuc tre » cua tre, cuu tre, cuc thue
va danh » va dinh, va dan, va hanh
duc tre » duoc tren, duc tien
sach v » sach va, sach y, sach 2
nang o » nang co, nang ho, nang ro
v nang » va nang, vu nang, van nang
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 v nang o hoi. hieu qua ((tham soc) or (tham nuoc)) va danh dien ((cuc tre) OR (duc tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang o hoi. hieu qua ((tham soc) OR (tham nuoc)) va danh dien ((cuc tre) OR (duc tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang o hoi. hieu qua ((tham soc) or (tham nuoc)) va danh dien ((cuc tre) OR (duc tre))*".