Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
tinh lap » trinh lap, tinh lao, dinh lap
chau tre » chay tren, chau tho, cau tra
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang co » nang cao, nang doc, nang noi
va tinh » may tinh
cho tre » cho thue, khoe tre
co hoi » co hoc, co loi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang co hoi. hieu van pham duc va tinh lap ((chau tre) OR (cho tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang co hoi. hieu van pham duc va tinh lap ((chau tre) OR (cho tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang co hoi. hieu van pham duc va tinh lap ((chau tre) OR (cho tre))*.