Perhaps you should try some spelling variations:
thieu nien » thien nhien
tang tai » hang tai, dung tai, sang tao
nien cac » vien cac, dien cac, bien cac
cua viet » ca viet, cua vat, cua dieu
tu cach » tu cac
tu tang » tuc tang, tu trang, tu tong
tai hoi » tai khoi, dai hoi, tai hai
cach tu » cach thuc
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach tu tang tai hoi. thieu nien cac ((xuc va) or (luc va)) hanh vi ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu tang tai hoi. thieu nien cac ((xuc va) OR (luc va)) hanh vi ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: tu cach tu tang tai hoi. thieu nien cac ((xuc va) or (luc va)) hanh vi ((cua viet) or (hoa viet))*.