Perhaps you should try some spelling variations:
thuat lap » thuat lanh, thuat xay, thuat bai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
tinh de » tinh da, sinh de, tinh he
va tinh » may tinh
hau duc » huu duc, ha duc, pham duc
van hau » van ha, van hai, van dau
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
de cua » le cua, te cua, dieu cua

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

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