Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
hang di » hang doi, hang vi, hang dien
nang xa » nang x, lang xa, nang ma
va hang » van hang, va nang, va lang
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
y nang » ky nang, ly nang, v nang
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 (thuat sach)) y nang xa hoi. hieu ((ve cam) 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 (thuat sach)) y nang xa hoi. hieu ((ve cam) 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 (thuat sach)) y nang xa hoi. hieu ((ve cam) or (va cam)) luc va hang di qua su".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) y nang xa hoi. hieu ((ve cam) or (va cam)) luc va hang di qua su*.