Perhaps you should try some spelling variations:
thuat lap » thuat lanh, thuat xay, thuat bai
hieu van » hieu va, thien van, lieu va
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
cam duc » cao duc, pham duc, nam duoc
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

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