Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
luc va » duc va, tuc va, loc va
cua te » cua tu

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) or (toc sach)) _ lang ((van hoi) OR (van hoe)). thien van cam luc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) _ lang ((van hoi) OR (van hoe)). thien van cam luc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) _ lang ((van hoi) OR (van hoe)). thien van cam luc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) _ lang ((van hoi) OR (van hoe)). thien van cam luc va hanh vai cua te*.