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
lap chau » lai chau, a chau, ha chau
chau tre » chay tren, chau tho, cho tre
te sach » toc sach
ty nang » ky nang, ty hang, ly nang
va tinh » may tinh
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) OR (ty xang)) co hoi. hieu van pham duc va tinh lap chau tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ty xang)) co hoi. hieu van pham duc va tinh lap chau tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ty xang)) co hoi. hieu van pham duc va tinh lap chau tre*.