Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam cua » lam chat
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
tuc va » thuc va, truc va, tuc xa
o hoi » co hoi, o hoc, o hai

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 ky nang ((5 hoi) or (o hoi)). hieu van cam tuc va tinh ((lam cua) OR (nam cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((5 hoi) OR (o hoi)). hieu van cam tuc va tinh ((lam cua) OR (nam cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((5 hoi) or (o hoi)). hieu van cam tuc va tinh ((lam cua) OR (nam cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((5 hoi) or (o hoi)). hieu van cam tuc va tinh ((lam cua) OR (nam cua)) te*.