Perhaps you should try some spelling variations:
tham doc » than doc, tham nuoc, thuat doc
ky lang » ky dang, ky tang, tay lang
tham do » thai do, pham do, tham du
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
va dau » va dao
dau vi » dau ve, dau va, dat vi
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ((ky lang) OR (ky nang)) xa hoi. lieu va ((tham doc) or (tham do)) va dau vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ((ky lang) OR (ky nang)) xa hoi. lieu va ((tham doc) OR (tham do)) va dau vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ((ky lang) OR (ky nang)) xa hoi. lieu va ((tham doc) or (tham do)) va dau vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te cac ((ky lang) OR (ky nang)) xa hoi. lieu va ((tham doc) or (tham do)) va dau vi cua tre*.