Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, luan phan
phan duc » pham duc, phan tu, phan dau
hanh vai » hanh vi, hanh va, hanh tai
thu tai » tu tai, tru tai, thuoc tai
thu hai » thu ha, thu nhap, thu hang
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu tai) OR (thu hai)) ky nang xa hoi. hieu van phan duc va hanh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu tai) OR (thu hai)) ky nang xa hoi. hieu van phan duc va hanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu tai) OR (thu hai)) ky nang xa hoi. hieu van phan duc va hanh vai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: ((thu tai) OR (thu hai)) ky nang xa hoi. hieu van phan duc va hanh vai ((cua te) or (cua tu))*.