Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
xuc van » duc van, luc van, vuc van
hoc cac » hoc cao
qua cam » qua cham, qua ca, qua cai
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
qua cac » cua cac
cac ly » cac ky, cac le, cam ly

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

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