Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
nuoc van » nuoc san, luoc van, nuoc dan
nang khi » bang khi, nang ghi, nang thi
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
van cac » van hac, van cau, van bac
khi cua » chi cua, thai cua
cua te » cua tu

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 (nang x)) hoi. thien van cac ((nuoc van) OR (nuoc va)) nang khi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (nang x)) hoi. thien van cac ((nuoc van) OR (nuoc va)) nang khi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((nang xa) or (nang x)) hoi. thien van cac ((nuoc van) OR (nuoc va)) nang khi cua te".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) or (nang x)) hoi. thien van cac ((nuoc van) OR (nuoc va)) nang khi cua te*.