Perhaps you should try some spelling variations:
thien van » thi van
cau tren » cu tren, dau tren, ca tren
va trien » va truyen, va thiet, va tuyen
van cach » va cach, van canh, vat cach
cuu tre » cua tre, cau treo
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
cach tu » cach thuc
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
va hanh » van hanh, va thanh, va danh

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

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