Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
ca tren » cau tren, la tren, co tren
van anh » van thanh, tuan anh, van minh
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
cu tren » tu tren, dua tren
anh va » hanh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang xa hoi. ((hieu ve) or (hieu va)) cham duc van anh va ((ca tren) OR (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cham duc van anh va ((ca tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu ve) or (hieu va)) cham duc van anh va ((ca tren) OR (cu tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu ve) or (hieu va)) cham duc van anh va ((ca tren) OR (cu tren))*.