Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly vang » ly hang, ly van, ly quang
vang xa » lang xa, mang xa, ang xa
van bac » van ban, van bao, van hac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau treo
bac tu » ban tu, tac tu, cac tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ly vang xa hoi. thien van bac tu va hanh vi ((cua tre) or (((cuu tre) OR (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly vang xa hoi. thien van bac tu va hanh vi ((cua tre) OR (((cuu tre) OR (cau tren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly vang xa hoi. thien van bac tu va hanh vi ((cua tre) or (((cuu tre) OR (cau tren))))".
• Adding a wildcard symbol may retrieve word variants: su sach ly vang xa hoi. thien van bac tu va hanh vi ((cua tre) or (((cuu tre) OR (cau tren))))*.