Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
nang xa » nang x, lang xa, nang ma
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
luc va » duc va, tuc va, loc va
va cai » va cac, va bai, va dai
va cam » va cham, va cac, va cao
di qua » di cua, di quanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu ((va cai) or (va cam)) luc va hang di qua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu ((va cai) OR (va cam)) luc va hang di qua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu ((va cai) or (va cam)) luc va hang di qua su".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) ky nang xa hoi. hieu ((va cai) or (va cam)) luc va hang di qua su*.