Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
kha nang » phap nang, ky nang, ki nang
van dang » van dong, van dung, van nang
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va hoc » van hoc
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky ((nang xa) or (lang xa)) hoi. hieu va hoc nuoc ((kha nang) or (van dang)) tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (lang xa)) hoi. hieu va hoc nuoc ((kha nang) OR (van dang)) tai cuc te.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) or (lang xa)) hoi. hieu va hoc nuoc ((kha nang) or (van dang)) tai cuc te*.