Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ca tren » cau tren, cu tren, la tren
nang o » nang co, nang ho, nang ro
ve cam » ve cham, ve cac, va cam
cua te » cua tu
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: ((thuoc sach) OR (nuoc sach)) ty nang o hoi. hieu ve cam duc va hanh vi ((cua te) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) ty nang o hoi. hieu ve cam duc va hanh vi ((cua te) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (nuoc sach)) ty nang o hoi. hieu ve cam duc va hanh vi ((cua te) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (nuoc sach)) ty nang o hoi. hieu ve cam duc va hanh vi ((cua te) or (ca tren))*.