Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
tinh doi » trinh doc, trinh do, tinh hoc
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
cam luc » cam xuc, cau luc
tinh di » trinh di, tinh da, tin di
van cam » van nam, van lam, van cau
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (thuat lanh)) ky lang xa hoi. hieu van cam luc va ((tinh di) OR (tinh doi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (thuat lanh)) ky lang xa hoi. hieu van cam luc va ((tinh di) OR (tinh doi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sanh) or (thuat lanh)) ky lang xa hoi. hieu van cam luc va ((tinh di) OR (tinh doi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (thuat lanh)) ky lang xa hoi. hieu van cam luc va ((tinh di) OR (tinh doi)) cua tre*.