Perhaps you should try some spelling variations:
thien van » thi van
cua viet » hoa viet, cua vat, cua dieu
te sach » toc sach
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
van cam » van nam, van lam, van cau
cam luc » cam xuc, cau luc
ly nang » ky nang, ly hang, ly vang
ca viet » va viet, co viet, hoa viet
y nang » ky nang, v nang, may nang
luc va » duc va, tuc va, loc va
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 ((y nang) or (ly nang)) x hoi. thien van cam luc va hang di ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) x hoi. thien van cam luc va hang di ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ly nang)) x hoi. thien van cam luc va hang di ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly nang)) x hoi. thien van cam luc va hang di ((cua viet) OR (ca viet))*.